Great entry! This would probably be one of my favourites of the jam if I didn't find it so obscenely difficult! I was never able to get further than the third level.
Aesthetically I liked how the camera only moved in grid increments, but it made moving between screens a bit disorienting. This, paired with the fact that enemies could spawn right on top of you with only a second or so to react made it so I was constantly taking damage by simply walking around.
I appreciated that the game saved your cube progress between runs (especially since I fell through the floor a couple times) but I would have liked if collecting all the cubes let you skip a level entirely instead of simply giving you a damage boost. Most of the enemies take only a couple hits to kill anyway, and it took multiple runs to collect them all for just the first level.