There are also other secret rooms on the map, I do not know which one you are talking about specifically

there are hints on the map, but if you couldn't find them, I can send the door code in a personal message, just add me as a steam friend, and thank you for playing my map =)

how to get to the secret room？

if you're talking about a combination lock, that's what it's meant to be. In general, it is better to once again take a step closer to the door.
but thank you for feed back, maybe I'll check it in hammer for fix

I noticed a bug with the teleporting doors in the house. If you're far away, you won't get teleported. This could probably be solved with use of point_teleport entities.

i love this

Yes, if you have friends :)

it is fun to play around on with friends :)