Okay, so the game is pretty hard between the 10 and 20 stages, but after that it becomes extremely broken. I ended up basically invincible around stage 30, and I let myself get killed long after that because I was bored to hell and obviously the challenge was over. I had a weapon with critical strike so I could 1-hit absolutely any foe. There are several things to improve, for example enemy spells are fixed so at later levels they become little more than a distraction, and player spells are pretty bad too. The summoned skeleton always have the same HP and damages, which makes him pretty useless. I must point out that this was my 8th character, all the others died before stage 12 so it's not like it happens on a hourly basis. Also, I guess the ability to toggle quality would be nice, for slower computers: it caused me a severe bug with an other character where I got 10 levels in a row and the enemy I killed dropped at least 60 items. Still a very good game, overall.