I propose that a third layer to place objects be implemented. The reason I would suggest this is because there have been many times I wish I could place objects which my character could go behind such as door frames or supports for caves simply for astetic reasons. Currently it appears there is the background image behind everything, then the layer which I can place walls and then a layer which I can place everything else like blocks and furniture. Since there is a "background" layer for the wall I feel that an additional layer which NPC's and enemies and the playable characters would go behind to create a greater feeling of depth.