fixes:

- fixed bumpedge test for obstacles
- fixed obstacle crash when going to the south or east
- added wasm builder

assets/levels/openquell.ldtk

@@ -11,7 +11,7 @@
 	"iid": "267e9380-d7b0-11ee-a97e-35bec9c19d52",
 	"jsonVersion": "1.5.3",
 	"appBuildId": 473703,
-	"nextUid": 29,
+	"nextUid": 31,
 	"identifierStyle": "Capitalize",
 	"toc": [],
 	"worldLayout": "Free",
@@ -624,7 +624,7 @@
 			"__bgPos": { "topLeftPx": [0,0], "scale": [1,1], "cropRect": [0,0,640,480] },
 			"externalRelPath": null,
 			"fieldInstances": [
-				{ "__identifier": "level", "__type": "Int", "__value": 2, "__tile": null, "defUid": 11, "realEditorValues": [{ "id": "V_Int", "params": [2] }] },
+				{ "__identifier": "level", "__type": "Int", "__value": 1, "__tile": null, "defUid": 11, "realEditorValues": [{ "id": "V_Int", "params": [1] }] },
 				{ "__identifier": "description", "__type": "String", "__value": "Collect the golden spheres by moving the blue one", "__tile": null, "defUid": 12, "realEditorValues": [] },
 				{ "__identifier": "background", "__type": "String", "__value": "background-lila", "__tile": null, "defUid": 13, "realEditorValues": [] },
 				{ "__identifier": "minmoves", "__type": "Int", "__value": 7, "__tile": null, "defUid": 14, "realEditorValues": [] }