Oh man this is something I always wanted to make, so I'm glad to see this be a thing submitted to the jam! I've played around with it a little bit (and I'm going to play some more) but I'm enjoying what's there so far.
I will say it's a little RNG at the start as to whether you encounter a hobgoblin with a longsword when opening the first door, but games are easy enough to restart that it isn't too much of a problem.
System-wise I haven't found that many mutation potions but I did note that one game one of the first ones I got was quadrupedal, which is kind of funny to imagine with no other mutations - perhaps some means of gating mutations behind having some of a different category (or having a certain amount of mutations), or progressive mutations that can be replaced by more advanced stages.
Quick note is having ESC both exit menus and the game itself made me accidentally quit the game when I wasn't intending to, perhaps this could be changed to something like Shift-Q to prevent this.
Overall I really like ASCII roguelikes so this one could get me playing for a long time if you keep at it, really nice opening submission and I'd be keen to see those future updates for sure!