This was unexpectedly good, in a good w ay. The Graphics were really good. I loved the game and there's a lot of replay value.
I just have couple of small suggestions -
This might be a me thing, but the player feels very short and the shooting feels off. I suggest adding a crosshair and adding more particles effects.
Apart from that. You have a super fun game. Super replayable and the music is. Congrats on your game! :)