I love it!
Shooting zombies on here is better than shooting zombies on Resident Evil(Which I didn't like). I really liked this! you used all the frames of animation from Metal Slug, and I think you added a couple of bloody ones!. I'm pretty sure that "enter the survival..." thing was a refrence to Resident Evil right?. I love how you made it all dark, and when the health is low you hear a loud heartbeat, I really like that! it got me into a survival horror feal.