Very cool logic game! It had me scratching my head in a couple of levels. I also appreciate the polished UI and menus, you really went the additional mile there. Sometimes it was a bit hard to distinguish the high from the low tiles. Maybe the unbuildable tiles could be represented with a flat X instead of a low platform? Also, I'd appreciate a hover effect to highlight the square I would be putting the block before placing it, as I missed the squares multiple times.