This shit goes hella hard. Would love to see more bonuses for combo focusing towards higher gold income in fights. Everything about it is super fun though, just wish it was a little bit longer. Even if its a lot of repeats of enemies etc, or you can only take one skill to the following zone with increased difficulty.
Regardless Fantastic stuff, almost everything has an amazing use in combat, from smoke on bosses, to pre trapping, to lightning sniping one hp archers, and freeze buying the time neccesary on the later portions where one hitting is no longer feasible unless you're prepositioned.
Also sidenote/appreciation for the ability to hurt yourself for gold being a consistent location to travel to is a lot of fun for a more difficult but well funded run. With a few more locations other than fights in the mix I can totally see this working out in a fantastic classic roguelike progression, would love to see that realized!