Wow, that was a lot of fun! I love the combat mechanics, they're challenging, interesting, and feel pretty fresh. Also turn-based and seemingly balanced, both great =). The auto-resolve is also a real nice feature! I managed to get to the end, although your prediction of "15 minutes" was grossly underestimated (it took me about 45 minutes, with a few deaths, a bit of redundant exploration, and a couple fights that I probably didn't need to do, but felt I could do better, since it was tracking the auto-resolve HP loss, I had to try ^_^).
Only thing that I felt was missing was some way to view the enemy's potential attacks mid-battle, as it showed them before the battle, but I often forgot the details. Not sure if that would have made it too easy or not though...