So a lot of good things are happening here. The title in itself is just so good, it gives me style, flavour and a unparalleled fear for a were-moose. I mean what the f***.
I also really enjoy a villain who strikes when the hero is down. Why bother? Just kill them when they are close to dead.
One thing I would challenge are all the DR14-checks. That's quite a steep curve to pass. It also passes 35 % of the time, and then after a fail (which is highly likely) then you're down to only passing 25 % of the time. So it will roll rather quickly. I guess that's what you're after, since you want this ended in 1 hour of play.
Another thing which could be nice was more than just traps and checks. Some treasure? Something you wanted to hunt? A smoke in a chimney? Why are the players where they are? And why would they enter the castle? Do they know a rumour.
Anyway this is all jazz that couldn't fit because you only had an A5. So I'm sorry! I just see so much potential which is the mark of good creative work. So all shut up and applaud your work instead. Good job!