really interesting concept! i loved the idea of having to build the level in a smart way so you don't accidentally end up with something you can't beat. one thing i noticed with it, though, was that it's very easy to cheese - once you build up to be able to place blocks high above you, there's basically no risk. maybe it would help to make the initial level more restrictive, with less space for avoiding blocks you place? i also really loved the moth design, they're super cute! one last thing i noticed was that it's really nice how the tileset automatically updates the textures with where you place blocks, it does a lot for the game. nice work!