finaly got ldtkgo to work!

systems/collectible_system.go

@@ -114,8 +114,8 @@ func (system *CollectibleSystem) AddParticle(position *components.Position) {
 	pos, particle, timer := ptmapper.Get(entity)
 	observer.AddEntity(entity, particleID)
 
-	particle.Index = assets.Tiles["particle"].Particle
-	particle.Tiles = assets.Tiles["particle"].Tiles
+	particle.Index = assets.Tiles["Particle"].Particle
+	particle.Tiles = assets.Tiles["Particle"].Tiles
 
 	pos.Update(
 		position.X-(16), // FIXME: use global tilesize!

systems/hud_system.go

@@ -47,7 +47,7 @@ func (system *HudSystem) Draw(screen *ebiten.Image) {
 
 	score := fmt.Sprintf("Score: %d", system.Observer.GetScore())
 	level := fmt.Sprintf("Level %d %s", system.Plan.PropertyByIdentifier("level").AsInt(),
-		system.Plan.PropertyByIdentifier("name").AsString())
+		system.Plan.Identifier)
 
 	assets.FontRenderer.Renderer.SetSizePx(20)
 	assets.FontRenderer.Renderer.SetTarget(screen)