The game looks nice. I like how the pistol looks. I'm not sure what the ammo counter is for since the reload is instantaneous and it doesn't run out. Having a lot of the one-shot ammo is really OP unless you're going to throw in a really large number of enemies at the player. The opening sequence is nice. I think the game need hit feedback on both the player and the enemy. And enemy death animation. Bullet trails would also be nice.
Good job on the game.