Game bugged out for me once, It prompted me to select an artifact and would not exit the promt. It let me take as many as I wanted and I could cast world-map spells but not move.
Other than that it's a great game! :D
Sorry about the bug! (And my slow response!) I still haven't found the cause of that one, unfortunately, but you're not the first person hit by it. Glad you enjoyed it otherwise!