It sucks?
I found the game to be pretty fun. Even if I do suck at it.
I understand how you want this game not to be another GH clone. And, in some sense, Guitar Hero never had zombies, or using torches and lawnmowers. The originality was there.
The graphics are decent. Johnny's muscles are fairly detailed, as well as Aunt Jill's wrinkles. Everything else could be a little better.
The dialogue isn't hilarious, as it should be, yet it has some chuckle factor. An example are all the Resident Evil references when in Aunt Jill's workshop.
Overall, a pretty good game. A few tweaks and improvements and it should rock.