Story wasn't something entirely predictable, yet it wasn't surprising? I felt like the pacing was too fast and the events jumped from A to B too randomly. I found it interesting that the demon or the boy were never named, and that was a plus for me.
If it helps, one thing I especially liked was the planting of the olive tree, as pointed out before it was a sort of olive branch. The boy let him trust the fiend despite all he knew prior about them, and that ended up well for the both of them. Somewhere along the way I wanted it not to end up well, but that's just me.
Music was a bit too dramatic for my tastes but there's no denying that it's of good quality. It helped tie together the mood and atmosphere.
And well, I feel really bad that I can't give a completely positive review. I see all the polish and hard work that went into making this game, but the writing was the weakest link for me. It's not bad, don't get me wrong, but it could have been better. I know NaNo's time restraints could have compromised a few things, but with a little more time to refine things, this game would have gone onto my favorites. Despite this I'd still recommend this game to anyone new to the VN scene.