Hey there,
Cute art style and love the song you put in the game! As a recommendation, I would try tweaking the numbers on movement speed in and out of 0 gravity. Also the aliens are OP haha they kill you faster than the player can move. Other than that, I could totally see a whole game around this anti-gravity suit wearing astronaut! If it was fleshed out with a story, and maybe a Metroid-Vania type gameplay where you unlock new abilities for your space suit and explore the depths of the space ship this would have great potential!
Great work!