Okay, I've made it around the whole building and can't figure out what to do. There's a boat, toilets, showers, a white locker and a pink door. The showers and the toilet doors were the only thing I could interact with.
The primary purpose of the game is to explore at your own pace and discover what you can find. Based on what you've said, I don't think you've found everything in this version. Best of luck and thank you for playing!