Nice start! The mechanics were really intuitive. I particularly like that pulling your weapon forces you to stop, and holstering it for a while reloads the weapon. Two suggestions would be to make the WASD movement always aligned with the grid so the player has more control and the game seems more fair. Secondly, I think the pistol should reload when sheathed even if its partially empty, so the player can properly prepare for the next round of zombies. Good submission!