Really great entry, I love the lighting and the weapon selection at the start, that along with level generation definitely added a replayability aspect to it. One thing I noticed is the backtracking - it's not that fun to find the door and having to farm like 200 more coins by going back a bazillion rooms, the door should spawn automatically near you when you get the 500. Also with the shotgun the boss was a pushover, you could just go in a circle and never get hit, some movement prediction formula would've fixed that. Ignoring these small quirks, it's still a wonderful game, really great job!