AHAHA the barrels were still a WorkInProgress (you found all the issues! no damage, messed up VFXs, when fallen the hitbox is too low for the shots) that never got done due to time running out =/
Thank you for the feedback on the controls! Some people suggested mouse controls over keyboard and that would probably help. I agree the zombie sounds are a bit annoying after a while. I'll add these to the post-jam backlog.
I'm glad you noticed the health xD