Sick game. I found myself easily becoming overpowered for the later "floors", and in I could easily beat the final floor with the loot I had from a floor earlier, but other than that I loved it. The heat system is a great way to add a sense of "urgency" without a timer, and punish players who gets lost.
I had what I think was a small bug, where multiple music tracks would play at once, maybe the track is meant to be that chaotic, but it was definitely overwhelming audio wise.