I really liked this game!
At first the difficulty is a bit sudden, but once you retry a bit you get the game! In terms of mechanics, I think it's pretty solid and well developed. It'd be interesting to have more content once the jam is over so you can really put the player to the test!
In terms of aesthetics, I think it all works very well. I think you could maybe add some particle effects when you do kill an enemy, so that you get a bit more punchy, satisfying feedback for the player.
The music is pretty fun, I liked it a lot. The sound effects were good too!
Nice job, keep up the good work!