I'm not a big fan of platformer on game jams, because it's a very hard game genre to make in a small window of time. This game is no different for me - the movement feels a little bit off. HOWEVER, the game has a really nice concept and artstyle, and i'm sure that it would be a great game if you'd be willing put more time on it after the Game Jam. Some energetic and space music would also help this game a lot to motivate the player to progress.