I'm a big fan of over scoping my games so I can see a lot of charm in a unfinished game.
I like the little auto battler combat you made and I can see you put a lot of work into all these systems to make it feels like a real RPG. The most obvious feedback is it requires some art to bring it all together.
I think you've mentioned it already but the scaling is pretty crazy, I was lvl 200ish and farming the lvl 450 zone just to get a single level a fight. I think I hit 300 when i could gamble on 650 levels and it was mostly a dice roll on if I would win and I'd still only get a few levels out of it.
I also have no idea how I'd accomplish anything in 20 BP, I think I was -500 or something at the end.
Luckily the boss actually wasn't very tough so I was grinding for nothing it seems.
Nice work.