_The music is really loud, I suggest a menu and a music adjustment. Trust me, Curdle gonna use your music in the stream and it gonna blast people's ears unexpectedly.

_Maybe make everything smaller so you have more space to move around (just maybe)

_I like the idea that you go outside and die if outside for too long but maybe add something in the background, it kinda empty, maybe some star (it optional so it up to you) also maybe make the bar appear on top of the ship so the player notice faster (also optional)

_The buffs may be different colors for easy recognition.

_The enemies flying down and shooting projectiles, the projectiles also very fast so it is hard to dodge and kill them. You could change them into meteor or make the ship fly down to appear on the map and fly around shooting down rather than flying down. 

This is what I think you can change a lil bit. I like the idea of the game and think it can expand more, keep it up😁👍