This is great! The art and music are both awesome, I especially like how the UI looks.
I wish the camera was a little bit more zoomed out though (Or maybe you could look down or something), there are more than a few areas where you can't see the ground while you're in the air, which makes not landing on spikes/enemies a little more frustrating than it needs to be.
Other than that, great job! You can tell a lot of work went into this