Your time estimates are bang on!
It's just a shame that the game itself was found extremely lacking. Quest item drop rates are pathetic, it took me 2 hours of grinding to get 2 souls from the ghasts in the second temple. The hit/miss calculation seems to be fairly faulty as well. There should be no reason that I would miss a level 10 enemy 6 times in a row at level 21. You have a pretty good basic concept that needs some serious overhauling in the mechanics department. All in all a good game and thoroughly enjoyable, but the faults of the game itself lend to a very low score.