It's right in the middle of the village. Not sure which way you come into Kaya, but if it's from Hisarönü then simply follow the road past Cinbal and keep going, you'll pass Levissi Gardens on your left, Kaya Gardens on your right, a few shops and small pancake houses....
Muzzy's is a bit further on on the left, pretty much opposite a dirt-track turning up to the camel rides, Antik restaurant and another entrance to the Ghost Village. It's just before the Istanbul, so if you pass that you've gone too far.