Kill monsters, collect loot, level up and ... repeat.
Jokes aside, there's very little that sets Avencast apart from countless single player hack and slash predecessors. If the riddles in the beginning of the game gave you impression that this game is going to be something unique, you are soon pulled back to reality by having to clear from monster room after room. Which doesn't have to be a bad thing. I found myself interested in the game enough that I played it until the end.
Bottom line is, if you are looking for something new you won't find it in Avencast. However, if you are single player RPG junkie like I am, you'll play this one anyway.