I'll start off by saying I am not a fan of battle grinders, so take what I am about so say as very biased.
I played several times and could never get more than a few steps away from the healing start. Maybe I am terribly bad at this. The main problem was the random powers and strengths and abilities of the enemies that I had to fight.
On one play attempt I was drained of MP on the first fight with no drops to replenish me. I didn't last after two more battles.
That said I think it's a fantastic concept that with some polish, and maybe some better leveling and a little more work towards balance, would make a frustratingly fun game. I can definitely see this as a plot point map in a much larger game where a character is separated from his party and tossed into this pit like scenario.
It's definitely something that, were I better at battles, I might have done better with. As is it works for what it is supposed to be. The map works, the mechanics need fine tuning but work, and the lack of any meaningful plot also works.
I may try again after I play other games as practice to get better at the RPG battle system too!