switched to use the level gbimage instead of the background property

game/levels.go

@@ -38,10 +38,9 @@ func NewLevel(game *Game, cellsize int, plan *ldtkgo.Level) *Level {
 
 	gridcontainer := &grid.GridContainer{}
 
-	// FIXME: use plan.BGImage.Path here?
 	systemlist = append(systemlist,
 		systems.NewGridSystem(game.World, game.ScreenWidth, game.ScreenHeight, cellsize,
-			assets.Assets[plan.PropertyByIdentifier("background").AsString()]))
+			assets.Assets[util.GetBGImage(plan)]))
 
 	systemlist = append(systemlist, systems.NewCollectibleSystem(game.World, cellsize))