Really impressive that you managed to pull this off alone with so little time! Feels like you really polished it a lot and achieved a great flow. The gameplay on its own is fun but the slow motion when you're about to be hit completes the experience and managed to keep my flow state going. On my best run I managed to get a score of 44. Not sure if that's good, but I had a fun time :)
And the sound design is not bad, even though you say you suck at it. The music has a nice clean sound and feels just right for the game. And the explosions are satisfying but not too overpowering. The only sound I don't like is that high pitched beep (I think that's when objects spawn) and a sound effect that plays when entering slowmo would be pretty cool.