Good game. As other comments said, you should buff the damage and maybe add more aoe(i've only tried 2 guns). The enemies are overlapping weirdly. You could fix this by adding y depth sorting + making the health bars a higher ui z index. The main menu buttons blended a bit too much into the background and you should make the first play animation a lot faster(you should make it zoom out for a couple frames then zoom right back in). Good game though!