I like playing the most recent games in itch.io sometimes and reply to them, thats probably why you got my feedback quick.
For the bugs:
1. When you move the character sideways and forward at the same time, the sprite just wobbles in these directions, I would say you make a new sprite for that direction movement.
2. I can't shoot while going from the zombies, maybe that is what you wanted, idk, but I would prefer for it to shoot at the direction of my mouse.