The music loop in this is really nice, it works really well for this game, and it doesn't get annoying quickly. The animation is smooth, and the SFX are great. The walking sound is out of sync at times, and will play mid air. It isn't immediately obvious that it's right shift to change dimensions, but it's easy enough to figure out, especially for a game jam game. There are some times where whatever collision system you have in place feels a little off, but not by enough that it really matters. Overall, great job! If you decide to continue to develop the game going further, I'll be excited to play whatever new levels you come up with!