Awesome, one of the best games in this jam. I got to level 18, before getting bored. The puzzles are okay, although some are too easy. The downside is that 4D levels take some time to do, manipulating all the blocks, but I'm not sure how to improve that. I would experiment with mouse control, if it makes controlling the character/blocks faster.
Suggested improvements:
More and longer music tracks
More puzzle mechanics and special blocks, like portals, magnets, 2x2 blocks
9/10