Its old school platformer goodness with crude humor and plenty of references to both the games of old and his own videos. Not 15 dollars worthy imo. From the few vids I've seen it looks like normal can be beaten in a few hours fairly easily. There have just been too many decent platformers the last few years to really recommend it.
From what I've heard it's a decent game, but personally what I've seen of AVGN was far more cringe-worthy than funny, and since the game obviously involves that kind of "humor" I don't plan on buying it.