Pros:

-Well made
-Big
-Not To Hard

Cons:

-The Finale Horde can be completely skipped over by crawling between the train cart you move and the blue one*

Conclusion:

*however this works very well with the kind of gameplay i like and it adds alot to the "if you do it to quick it will be harder" so a way to fix this that wont remove this would be making the Elevator itself call a horde ;)

all in all its a solid campaign i give this a 100 :D