So I just played and finished your game completely. I liked game design and idea! Though it didn't felt like I was creating my dungeon, more like learning game mechanics. It could've been more "game dev" themed. if you know what I mean. And the last boss fight was pretty rough x)
Background music reminds me of FEZ, composer did a good job on creating a proper atpmosphere here!
There could be much more to it, but as a game jam entry it's 10/10 game that should be deserving all attention :)