Really cool game, here are my feedback on it:
+ The universe is beautiful, it reminded me a lot of Sundered
+ The music is really good, it goes the same for the feedback sounds
+/- The character controls well most of the time! I noticed sometimes that I made an extra move, or there is an extra jump, whereas I released the left joystick/A button, I think that it is maybe a bug, like an input lag.
- For me, it misses some feedback on the player and the enemies, when they get hit, indeed, sometimes I didn't know if I hit the opponent, or if I was hit. So, I think that a little animation and/or a push on the player/enemy will definitely improve the feeling of the fight system.
Overall: Very nice work!