The controls feel a bit "floaty". When jumping the player rises a bit too slow and when starting to walk from a halt the acceleration takes too long to start moving, it feels like I'm constantly pushing against some invisible force to move my character.
also as others pointed out, the range of the attacks is too short which makes it much more rewarding to avoid enemies entirely.
I'm also not a big fan of the pixel precision jumps one has to make at some points, brings me back to castlevania times ^^;
Other than that, really well made and I'm sure you guys will get better with every jam you enter! The graphics are really nice and the tunes are quite catchy :)