I loved how much style you managed to fit into this simple gameplay loop with the music and enemies, and the timer works well here because it forces you to leave safety to seek out enemies. I also very much appreciated that you took the time to add a sensitivity bar to the options menu because it's so important in this type of game. My one suggestion is that a "hold click to shoot" option would have been helpful even if it's not at the quickest rate, because the clicking definitely starts to hurt after a few minutes. Overall though, great work!