Very cool game, Although I thought it was too easy. First thing I did was to go to the red door out of curiosity and managed to beat the boss only taking one hit. After that I restarted it and tried the other doors. Beat every single room and still only had money to buy one thing from the market thingy, also got a boot on a treasure room xD
If it was a bit more challenging it would be perfect, please continue working on it :D