There's also a locked door in one of the buildings, but I couldn't figure out what either mean if anything. It would be cool if the radio was used for something though
default
sauna
tent
cave
treehouse
house-main
house-cafeteria
house-bedroom
house-trophey
boat
telescope
It would be really cool if there were some secrets, but alas it appears not (unless it's obfuscated in the source as well)