Very cool idea! There's a nice strategy/management aspect with letting the heroes get far, but not necessarily to the end since you want their hard-earned cash. The art is simple and clear, and there's a nice reference to Slay the Spire's shopkeeper. The shop system wasn't immediately clear, and I don't think I got the crafting tutorial the first time I played.
I'd also like to be able to change one map slot, particularly if the heroes tend to die there immediately. It could cost money to replace the slot.