This is a fun experience! It reminds me of an old dungeon crawler that I actually played on an old nokia phone back in the day.
I think my biggest desired would be (as is listed on your potential features) a way to spend the coins. I kept searching hopefully for a merchant or something tucked away in a corner of one of the maps
I also noticed that the slimes won't actually ever get close enough to you to do damage if you stand still. Not sure if that was intended.
Really impressed with the procedural generation! Great job :D