Rather fittingly, the game kind of snowballed to a finish. The mountains got smaller and smaller, the number of things required to be done to progress the story became fewer and fewer, and then, Act V lasted all of about five minutes.
But the ending was GENIUS. I won’t spoil it, but it was a Giant Musical Finale. And the very last “thing” you have to do is suitibly epic, complete with epic music and stuff. Aces.