Nice work finishing something for the jam! I liked the music and the sound effects. The enemies seemed to be a bit damage sponge-y. Maybe reduce the hit points of some of the tougher ones just a bit. You could also add quick animation / feedback when enemies / bullets spawn in that lets you know where they are going to be. Would also be cool to have a title / gameover screen (even if it's just something simple). The controls were pretty responsive. All in all, nice work and congrats on your first game jam dude!