This was a nice short but sweet game! There really isn't that much going on in the art department, with different colors of primitives being used, but I do appreciate the particle effects though! I like the music! Its just gives off a really nice vibe when playing which I like! I also appreciate the sound effects present. I like the overall concept and feel that it could be explored even further if you were to continue making this game! I really love how you don't instantly lose when you use up all your deaths and just kind of replaces the earliest made cube! I feel like most games would have just put a "you lost" screen along with bringing you back to the start, so kudos for not wasting the players time! Also love the movement! It feels floaty, but satisfying to drift through the air given the overall speed of the game! Not saying there is an ideal movement speed and control that should be used for puzzle games, but its just a preference of mine for characters to not be slow so I can get to where I need to be faster! Also like the "R" mechanic where you remove one of your corpses from the level, but sadly it was only utilized in a single level. It could create a lot of interesting puzzles if explored further enough.
Overall, I wish there were more levels, because I really enjoyed what I played and love the concept! Hope you had fun making this and enjoying the jam in general! Great work!