Great game! As someone who had teh same idea, i love how you made it a FPS and had a points system, as well as adding progression with killing multiple enemies. variety is the one thing i wish I had in my game.
only thing, which im sure has been mentioned, is that the enemies shoot quite fast. it means that the player cant even catch a break because they always have to move and dodge. other than that small balance change, this game is great!