I think the music is the highlight for me - it brings a lot of soul to your game. I would appreciate having some way to either shoot towards the cursor, or shoot directly upwards; it is not easy to put a lot of damage into the dark moon boss if you have to jump to hit it once or twice, so options would be nice. Also, having just 3 hit points feels super tough. The hand drawn planets are really, really awesome, and it helps the art stand out from the crowd. Good work!