Cool game. It doesn't do much & it need a lot of polishing but the main game loop is there & it works well.
A few pointers for your next games or if you want to keep working on this one:
-Be mindfull of pixel size consistency. the pixels on your player were a lot bigger than the one in the environment around. It makes it looks out of place.
-The camera was a bit too zoomed in. it's always better to be able to see your surrounding a bit more to anticipate ennemies and navigate easily.
- Avoid Spawning ennemies too close from the player. It's always better to spawn them out of the field of view or give a warning of where they are gonna spawn so the player have time to avoid them. (I died because a zombie spawned right on me ^^)
Congrats on submitting ! keep going at it :)