lotsa fixes:

- fixed obstacle collision and death on obstacle spike
- moved player move into separate loop after other collision checks
  are done
- fixed level setup, generation and selection
- added test levels for obstacles

assets/levels/00-deadly-obstacles.lvl

@@ -0,0 +1,17 @@
+Description: test obstacles
+Background: background-lila
+                    
+                    
+                    
+   #######          
+   #  v  #          
+   #     #          
+   #> S <#          
+   #     #          
+   #  ^  #          
+   #######          
+                    
+                    
+                    
+                    
+                    

assets/levels/01-friendly-obstacles.lvl

@@ -0,0 +1,17 @@
+Description: test obstacles
+Background: background-lila
+                    
+                    
+                    
+   #######          
+   #  ^  #          
+   #     #          
+   #< S >#          
+   #     #          
+   #^   v#          
+   #######          
+                    
+                    
+                    
+                    
+                    

assets/loader-levels.go

@@ -128,8 +128,8 @@ func InitTiles() TileRegistry {
 		'+': NewTileObstacle("obstacle-star", config.All),
 		'^': NewTileObstacle("obstacle-north", config.North),
 		'v': NewTileObstacle("obstacle-south", config.South),
-		'<': NewTileObstacle("obstacle-east", config.East),
-		'>': NewTileObstacle("obstacle-west", config.West),
+		'<': NewTileObstacle("obstacle-west", config.West),
+		'>': NewTileObstacle("obstacle-east", config.East),
 		'*': NewTileParticle([]string{
 			//"particle-ring-1",
 			"particle-ring-2",