I'm so sorry about the ice physics, when playing through it again semi recently I realized that it really sucks lol. As for the building you're looking for, let's just say it outright tells you the time you are supposed to be there
Thank you for playing! I guess it is very obvious that yume nikki was the biggest inspiration and I wasn't even trying to hide it lol
And as for some of the imagery and the ending, yeah let's just say that I've also had some darker thoughts in my time (most of the things in the game are based on real dreams I've had, which is why some things are as convoluted as they are)