I really liked this one, and beat it on the first try.
Eventually though I feel like I am overpowered and just clicking on every tile. Maybe it would work better if money didn't open chests? As is I felt like I had to kill all of the monsters to get enough money to get chests or I wouldn't be powerful enough to beat the bosses. Maybe a key you need to find per level instead? Then I could avoid the monsters with good flagging and luck.