This is a really fun, pulpy romp. I kept laughing out loud at the different room descriptions. Cocaine in the desk, embalming room turned mess hall, the diary entries. Very funny read.
The room traps are good. My favourite would be the moon, with the phases as the sequence. Though I can see some difficulty for the DM trying to remember the names of the phases for the players.
Poking the pencil through the paper is a fun mechanic. Very tactile and memorable.
One thing that I think would have been nice to include is maybe some ideas on how to quickly adjudicated the large horde of resurrected zombies. I’m sure it would be easy for the DM to handwave this, but some sort of mechanic could shine here.