Very impressive. I love this concept and you did a great job executing it! If you continue this project, I think a good addition would be adding more color to the "ground" blocks to help the player visually distinguish the layers. You could also add small landmark aesthetic pieces to give the same effect. Maybe a 3x3x3 statue that the player sees cross-sections of while traversing the different dimensions. This is the first game of yours I've played, but judging by the quality of this one I think I'll have to check out the rest of your catalog. :)