Really enjoyed it!
I thought this was a fairly decent game for being made in 2 days, kinda makes me wish it was a bit longer..
One thing first.. I loved the art, it was beautifully done.
I'll admit the controls for the jumping were a little 'ugh' but after getting used to them it wasn't difficult.. just jump as soon as you land :P
The boss fight though I enjoyed. Having to dash behind after one combo and messing up prettymuch costed you everything I thought it made the challenge fairly decent. Also the limitless lives was nice to.. or I probably would of quit long ago haha.
Hopefully you decide to expand on this game, cause I'll definitely play it if you make another.