So, the map itself was actually created as a commission for The Idle House, a long defunct TF2 server. It had went through a few iterations before coming to it's final state, but those really weren't much to write home about (just some slight layout changes and song changes in the disco iirc)
As for secrets, there's not many, but two I remember are shooting the cow skull in the garage will unlock a path to the skybox in the freezer of the pub, and shooting the cow skull in the condo will unlock a path to the roof.

Awesome! I wanted to ask about a (maybe?) obscure map of yours "achievement_villains_day". If you remember at all, what can you tell me about how this map came to be and what secrets are located in it?

Hey sure, ask away!

Hey! I had a few questions about your old maps for a personal project. If you wanna chat I sent you a request on here :)

Thank you for the soundcloud backups on your site!!! I have not been able to find a ton of these artists

Just wanna say I'm a huge fan of your work, as silly as that may sound. Even inspired me to try my own hand at map creation, though I immediately realized I sucked. Either way, your stuff weirdly means a lot to me, so keep it up, brother.