I haven't played that game. The ones inspired me had great art and animations so I always wanted to make my art look like theirs.
I like the idea of shops at the surface. But all the upgrades will cost 25% and consumables will cost 50% more money.
Even though it's logical that skeletons should be revived like zombies but then there will be too many enemies that will keep coming back once you killed them. Golem also revives after sometime so that's make it two as of now.