Really good game! I found it fun. As someone already mentioned in a comment below, I’d lower the volume of the music a bit (it's quite loud). I like the badass vibe of the soundtrack. As feedback, I’d suggest making the game exponentially incremental instead of just defeating a set number of enemies to win. For example, each time you beat a level, increase the number of enemies to see how far you can go—this would add more challenge and replayability. But overall, I really enjoyed it.