Pretty well made. Different variations of zombies adds to the game. I also like the use of the platform. This game has plenty of potential as an endless runner/shooter and I love the direction.
A few notes:
- Controls are a bit unintuitive. I took me a second to figure out how to jump. My suggestion is to swap the keys for Space and S, but this is little more than a personal note. The shooting works well
-Jumping is practically infinite. My suggestion is to have a jump counter. Have it so Space can only be pressed twice before the jump is disabled. Then, when the player hits a surface, the counter resets.
Overall, nice work.