Terrific game, everything works well, though the rats look like sheep to me so they don't come across as very frightening ;-)
It took a few months, but I recently completed every character class under 45 minutes, with the fire mage being the easiest, clocking in at 35:15.
I did find that to beat 45 minutes you almost had to have lightning or fire magic by level 8 or so, or you might as well forget it.