small fixes

assets/loader-sprites.go

@@ -44,8 +44,8 @@ type AnimationMeta struct {
 
 // Needed to thaw sprite set written by asesprite
 type AnimationJSON struct {
-	Meta   AnimationMeta    `json:"Meta"`
-	Frames []AnimationFrame `json:"frames"`
+	Meta   AnimationMeta             `json:"Meta"`
+	Frames map[string]AnimationFrame `json:"frames"`
 }
 
 // used to store Animation data
@@ -133,7 +133,7 @@ func ReadJson(imagefile fs.DirEntry, fd fs.File) AnimationJSON {
 
 	err := json.Unmarshal(buf.Bytes(), &animationjson)
 	if err != nil {
-		log.Fatalf("failed to parse JSON: %s", err)
+		log.Fatalf("failed to parse JSON in %s: %s", imagefile, err)
 	}
 
 	return animationjson

assets/space/correct-oil.pal

@@ -0,0 +1,39 @@
+JASC-PAL
+0100
+36
+0 0 0
+0 0 0
+14 14 14
+29 29 29
+51 51 51
+80 80 80
+99 99 99
+122 122 122
+167 167 167
+192 192 192
+228 228 228
+251 245 239
+242 211 171
+237 193 132
+229 164 88
+222 112 44
+181 52 28
+139 22 22
+198 159 165
+183 134 134
+164 102 102
+133 79 79
+110 65 83
+74 44 65
+174 166 195
+160 130 170
+139 109 156
+119 86 127
+108 76 112
+64 53 79
+89 97 153
+73 77 126
+49 57 85
+37 38 63
+24 23 38
+16 13 21

assets/sprites/Makefile

@@ -0,0 +1,9 @@
+all:
+	@echo noting
+
+clean:
+	./rename.sh door1.png door-closed.png
+	./rename.sh door2.png door-open.png
+	./rename.sh transient1.png transient-open.png
+	./rename.sh transient2.png transient-closed.png
+	fd '[2-9]' --exec rm

assets/sprites/correct-oil.pal

@@ -0,0 +1,39 @@
+JASC-PAL
+0100
+36
+0 0 0
+0 0 0
+14 14 14
+29 29 29
+51 51 51
+80 80 80
+99 99 99
+122 122 122
+167 167 167
+192 192 192
+228 228 228
+251 245 239
+242 211 171
+237 193 132
+229 164 88
+222 112 44
+181 52 28
+139 22 22
+198 159 165
+183 134 134
+164 102 102
+133 79 79
+110 65 83
+74 44 65
+174 166 195
+160 130 170
+139 109 156
+119 86 127
+108 76 112
+64 53 79
+89 97 153
+73 77 126
+49 57 85
+37 38 63
+24 23 38
+16 13 21

assets/sprites/obstacle-alldirections-idle.json

@@ -0,0 +1,70 @@
+{ "frames": {
+   "obstacle-alldirections 0.ase": {
+    "frame": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-alldirections 1.ase": {
+    "frame": { "x": 32, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-alldirections 2.ase": {
+    "frame": { "x": 64, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-alldirections 3.ase": {
+    "frame": { "x": 96, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-alldirections 4.ase": {
+    "frame": { "x": 128, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-alldirections 5.ase": {
+    "frame": { "x": 160, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   }
+ },
+ "meta": {
+  "app": "http://www.aseprite.org/",
+  "version": "1.x-dev",
+  "image": "obstacle-alldirections-idle.png",
+  "format": "I8",
+  "size": { "w": 192, "h": 32 },
+  "scale": "1",
+  "frameTags": [
+  ],
+  "layers": [
+   { "name": "enemybot-jets", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-body", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-turm", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-turret", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-turret-head", "opacity": 255, "blendMode": "normal" }
+  ],
+  "slices": [
+  ]
+ }
+}

assets/sprites/obstacle-east-idle.json

@@ -0,0 +1,92 @@
+{ "frames": {
+   "obstacle-east 0.ase": {
+    "frame": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 1.ase": {
+    "frame": { "x": 32, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 2.ase": {
+    "frame": { "x": 64, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 3.ase": {
+    "frame": { "x": 96, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 4.ase": {
+    "frame": { "x": 128, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 5.ase": {
+    "frame": { "x": 160, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 6.ase": {
+    "frame": { "x": 192, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 7.ase": {
+    "frame": { "x": 224, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-east 8.ase": {
+    "frame": { "x": 256, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   }
+ },
+ "meta": {
+  "app": "http://www.aseprite.org/",
+  "version": "1.x-dev",
+  "image": "obstacle-east-idle.png",
+  "format": "I8",
+  "size": { "w": 288, "h": 32 },
+  "scale": "1",
+  "frameTags": [
+  ],
+  "layers": [
+   { "name": "enemybot-jets", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-turret", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-body", "opacity": 255, "blendMode": "normal" }
+  ],
+  "slices": [
+  ]
+ }
+}

assets/sprites/obstacle-north-idle.json

@@ -0,0 +1,92 @@
+{ "frames": {
+   "obstacle-north 0.ase": {
+    "frame": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 1.ase": {
+    "frame": { "x": 32, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 2.ase": {
+    "frame": { "x": 64, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 3.ase": {
+    "frame": { "x": 96, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 4.ase": {
+    "frame": { "x": 128, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 5.ase": {
+    "frame": { "x": 160, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 6.ase": {
+    "frame": { "x": 192, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 7.ase": {
+    "frame": { "x": 224, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-north 8.ase": {
+    "frame": { "x": 256, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   }
+ },
+ "meta": {
+  "app": "http://www.aseprite.org/",
+  "version": "1.x-dev",
+  "image": "obstacle-north-idle.png",
+  "format": "I8",
+  "size": { "w": 288, "h": 32 },
+  "scale": "1",
+  "frameTags": [
+  ],
+  "layers": [
+   { "name": "enemybot-jets", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-turret", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-body", "opacity": 255, "blendMode": "normal" }
+  ],
+  "slices": [
+  ]
+ }
+}

assets/sprites/obstacle-south-idle.json

@@ -0,0 +1,92 @@
+{ "frames": {
+   "obstacle-south 0.ase": {
+    "frame": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 1.ase": {
+    "frame": { "x": 32, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 2.ase": {
+    "frame": { "x": 64, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 3.ase": {
+    "frame": { "x": 96, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 4.ase": {
+    "frame": { "x": 128, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 5.ase": {
+    "frame": { "x": 160, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 6.ase": {
+    "frame": { "x": 192, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 7.ase": {
+    "frame": { "x": 224, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-south 8.ase": {
+    "frame": { "x": 256, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   }
+ },
+ "meta": {
+  "app": "http://www.aseprite.org/",
+  "version": "1.x-dev",
+  "image": "obstacle-south-idle.png",
+  "format": "I8",
+  "size": { "w": 288, "h": 32 },
+  "scale": "1",
+  "frameTags": [
+  ],
+  "layers": [
+   { "name": "enemybot-jets", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-turret", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-body", "opacity": 255, "blendMode": "normal" }
+  ],
+  "slices": [
+  ]
+ }
+}

assets/sprites/obstacle-west-idle.json

@@ -0,0 +1,92 @@
+{ "frames": {
+   "obstacle-west 0.png": {
+    "frame": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 1.png": {
+    "frame": { "x": 32, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 2.png": {
+    "frame": { "x": 64, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 3.png": {
+    "frame": { "x": 96, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 4.png": {
+    "frame": { "x": 128, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 5.png": {
+    "frame": { "x": 160, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 6.png": {
+    "frame": { "x": 192, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 7.png": {
+    "frame": { "x": 224, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "obstacle-west 8.png": {
+    "frame": { "x": 256, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   }
+ },
+ "meta": {
+  "app": "http://www.aseprite.org/",
+  "version": "1.x-dev",
+  "image": "obstacle-west-idle.png",
+  "format": "I8",
+  "size": { "w": 288, "h": 32 },
+  "scale": "1",
+  "frameTags": [
+  ],
+  "layers": [
+   { "name": "enemybot-jets", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-turret", "opacity": 255, "blendMode": "normal" },
+   { "name": "enemybot-body", "opacity": 255, "blendMode": "normal" }
+  ],
+  "slices": [
+  ]
+ }
+}

assets/sprites/rename.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+from=$1
+to=$2
+
+if test -e "$from"; then
+    mv $from $to
+fi

assets/sprites/robot-idle.json

@@ -0,0 +1,104 @@
+{ "frames": {
+   "robot #idle 0.ase": {
+    "frame": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 1.ase": {
+    "frame": { "x": 32, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 2.ase": {
+    "frame": { "x": 64, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 3.ase": {
+    "frame": { "x": 96, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 4.ase": {
+    "frame": { "x": 128, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 5.ase": {
+    "frame": { "x": 160, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 6.ase": {
+    "frame": { "x": 192, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 7.ase": {
+    "frame": { "x": 224, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 8.ase": {
+    "frame": { "x": 256, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   },
+   "robot #idle 9.ase": {
+    "frame": { "x": 288, "y": 0, "w": 32, "h": 32 },
+    "rotated": false,
+    "trimmed": false,
+    "spriteSourceSize": { "x": 0, "y": 0, "w": 32, "h": 32 },
+    "sourceSize": { "w": 32, "h": 32 },
+    "duration": 100
+   }
+ },
+ "meta": {
+  "app": "http://www.aseprite.org/",
+  "version": "1.x-dev",
+  "image": "robot-idle.png",
+  "format": "I8",
+  "size": { "w": 320, "h": 32 },
+  "scale": "1",
+  "frameTags": [
+   { "name": "Inactive", "from": 0, "to": 0, "direction": "forward", "color": "#000000ff" },
+   { "name": "idle", "from": 1, "to": 10, "direction": "forward", "color": "#000000ff" }
+  ],
+  "layers": [
+   { "name": "fire", "opacity": 255, "blendMode": "normal" },
+   { "name": "engines", "opacity": 255, "blendMode": "normal" },
+   { "name": "getriebe", "opacity": 255, "blendMode": "normal" },
+   { "name": "head", "opacity": 255, "blendMode": "normal" },
+   { "name": "noise", "opacity": 255, "blendMode": "normal" }
+  ],
+  "slices": [
+  ]
+ }
+}

flake.nix

@@ -0,0 +1,40 @@
+#
+# NixOS game dev flake by jchw 
+# https://discourse.nixos.org/t/how-to-build-a-golang-program-which-needs-system-libs/45682/14?u=uskeutia
+#
+# Use:
+# if flake.nix is inside a Git repo, but not added:
+# nix develop path://$PWD
+#
+# otherwise, just:
+# nix develop
+
+{
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  outputs =
+    { nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          nativeBuildInputs = with pkgs; [
+            go
+            libGL
+            xorg.libX11
+            xorg.libXrandr
+            xorg.libXcursor
+            xorg.libXinerama
+            xorg.libXi
+            xorg.libXxf86vm
+          ];
+
+          shellHook = ''
+            export LD_LIBRARY_PATH=${pkgs.wayland}/lib:${pkgs.lib.getLib pkgs.libGL}/lib:${pkgs.lib.getLib pkgs.libGL}/lib:$LD_LIBRARY_PATH
+          '';
+        };
+      }
+    );
+}

game/levels.go

@@ -11,6 +11,7 @@ import (
 	"openquell/util"
 	"strings"
 
+	"github.com/alecthomas/repr"
 	"github.com/hajimehoshi/ebiten/v2"
 	"github.com/mlange-42/arche/ecs"
 	"github.com/solarlune/ldtkgo"
@@ -151,7 +152,7 @@ func LevelToSlice(game *Game, level *ldtkgo.Level, tilesize int) (Map, Map) {
 					tile := assets.Tiles["default"]
 
 					// FIXME: load from LDTK file
-					tile.Sprite = assets.Assets["primarymap"].SubImage(
+					tile.Sprite = assets.Assets["tilemap"].SubImage(
 						image.Rect(tileData.Src[0],
 							tileData.Src[1],
 							tileData.Src[0]+layer.GridSize,
@@ -168,7 +169,7 @@ func LevelToSlice(game *Game, level *ldtkgo.Level, tilesize int) (Map, Map) {
 
 		case ldtkgo.LayerTypeEntity:
 			// load mobile tiles (they call them entities) using static map map.png.
-			tileset := assets.Assets["entitymap"]
+			tileset := assets.Assets["tilemap"]
 
 			for _, entity := range layer.Entities {
 				if entity.TileRect != nil {
@@ -197,6 +198,7 @@ func LevelToSlice(game *Game, level *ldtkgo.Level, tilesize int) (Map, Map) {
 
 					}
 					tileRect := entity.TileRect
+					repr.Println(tileRect)
 
 					tile.Sprite = tileset.SubImage(
 						image.Rect(tileRect.X, tileRect.Y,