Awesome game that was fun and challenging. I thought that the swapping between cubes and them having special capabilities was a really nice and fun idea and fits nicely within the theme. Also, I think the graphics and the visual effects (like the trail) were great.
I will mention a few things I noticed while playing. There were times where I did get stuck inside a platform if I jump to the bottom of it from a certain angle. Also, the audio messes up if I reset the game in the menu (sounds like multiples of it are being played on top of each other).
Other than that though (which are all mostly polish related things), this was a great game!