I've been playing it for a while now. Love it, it's like an entire 40+ hour rpg experience in 15 minutes, and the fact that one game goes by so fast means that I can play 10-15 times in a row without noticing how much time has gone by.
So far I've unlocked:
All the races All the classes except the one in the bottom right hand corner I've beaten snake pit, crypt, library, and factory with the 12 'main classes', crusader, and tinker and my gauntlet level is 11
Haven't put much effort into lothlorien or boss hive.