They are a bit cliche, I'll fully admit that! With the time allotted for the jam I didn't really want to spend precious time thinking of a more unique idea: I thought "this fits the theme, it'll do". I actually had a more varied party with a skeleton, a zombie slime and a ghost cat but that didn't carry the theme as well for me so I changed it to four zombies.
And yeah, that bug has been mentioned a lot and I'm really at a loss as to what's causing it. I'm looking into it and trying to fix it but I haven't managed to yet unfortunately! I'm glad you enjoyed the game despite that though, it means a lot that I could make you laugh!