Since this has a page now, I'll add it. Hands down the best romhack I've ever played. It definitely gets on your nerves with how random the exploration is but not many games are able to capture this eerie, dreamlike feeling that comes from exploring a seemingly endless castle.

The horror elements aren't too gratuitous and rather lite too. Highly recommend it to anyone who ever wished that for some reason, there was more Mario 64, or has a fascination with Mario 64 beta versions.