Beautiful pixel art, breathtaking soundtrack, very well done gameplay!
except for a few things:
while playing with a controller, it showed the keyboard control (I also couldn't use the speed ability at first, I think that might have been a bug though)
boss cutscenes should be able to be SKIPPED, not just fast-forwarded. I had a bit of trouble with boss number two and nearly gave up :(
Aside from those minor complaints, it's an hour-ish long romp that deserves tons of praise