Hate to be overly critical, but this one left me cold.
Too short, pretty tedious, nothing felt like there was any point to it. At no point was there any use of magic that required thought or cleverness... it was just open a box and it has what you need in it, go cast it in the obvious place, done. Suggestion: scenario should be about, oh, three times as long, and there should be actual puzzles, ie, something a little more complicated.
Tar Demon... why? It's held, poses no threat at all, and killing it gives you nothing. Pointless. Suggestion: remove the Held promotion so it can chase you, such that it's actually kind of scary.
I'm not into the lack of XP. BtS included a very fun adventure scenario where you wander around killing zombies (I think they were zombies? Been a while) and gathering powerups and whatnot. That was an excellent dungeon game... this was not. The removal of the possibility of leveling up made it very tedious. Leveling up makes me feel good... it's a little reward mechanism that keeps me going forward, because I'm close to the next one. With this it mostly just felt like a waste of time.
Lastly, as others said, there was nothing at all interesting about this in terms of the lore or character. It seems like a wasted opportunity... when I saw it on the scenario list I was excited, thought "that sounds really cool!" -- but the delivery was entirely meh-tacular. One riddle that had no relation to anything, a bunch of pointless combat, a couple "go to X and then go to Y" things, and it's done and I'm being told how I've done the impossible. Wooo.
As for Meshabber's riddle, I started to chart it out but before getting very far just guessed "golem" based on the lack of information either related to the golem or to "green," its colour (ie, a number of the others were ruled out because food was given, or given in relation to a colour), so while I hadn't actually proved for certain that it was the golem, it seemed pretty likely. Plus, I was getting bored.