I really liked this one. The 3D models for the player and gun were well done. I'm a sucker for immersive UI where the life/ammo is shown in the game world and not in a 2D HUD. The shooting with the sound and effects where awesome!
It would be a nice addition if you could crouch, run, and jump.
As feedback, maybe focus more on gameplay and controls next time.
But overall, amazing job!