I got to floor 15 out of sheer luck and then luck ran out. By luck, I mean I got food upgrades early without knowing what the letters mean. By luck running out I mean too many spikes. I have no interest in playing again. I'd rather not bother if there's a chance I'll take the vast majority of damage from spikes that are impossible to avoid due to blocking the way to the stairs, again.
Also, around floor 11 the game started lagging, in the worst possible way. The inputs became really slow to the point of having to press multiple times to move while the enemies sometimes appeared to go faster than I could.