Super Mario and the Monstrous Manor

Mario gets invited to explore a haunted manor in this unconventionally-structured major hack.

Solve puzzles, collect keys, and fight enemies to uncover the mystery of the manor

Versions:

Monstrous Manor v1.0
Monstrous Manor v1.0.1
Monstrous Manor v1.0.2
Monstrous Manor v1.0.3
Monstrous Manor v1.0.4
Monstrous Manor v1.1
Monstrous Manor v1.1.1