Does this game use any art from OpenGameArt.org? 

The rules of OpenGameArt.org's Summer Game Jam 2023 require entries to use and fully credit at least 6 artworks from OpenGameArt.org.  

See the jam rules for complete details.

The positives first. You can move around and kill enemies. the gas cans are cool. The map is cool. the guns are good feeling. 

Now the negatives. The enemy pathfinding isn't that good. There dosen't seem to be 50 zombies. The game could be better with music and sound effects and the art is ok but you should have used a invisible border