So far I have endings 3, 5 and 6, but I can't for the life of me figure out how to get the other endings. I don't want to search around the net, as I don't want the other endings spoiled, I just want some really slight hints to nudge me in the right direction (replaying the game over and over is starting to drive me insane).
My thoughts were to try out various combinations of rooms, but from what I can tell, the ending seem to only relate to the final room that you end up in. Beyond that, I tried giving the clover bookmark to Clover, then talking with her again later; but that didn't seem to actually change anything.
I'm assuming that some combination of choices may lead to something, but most of the choices seem pretty inconsequential. There's also a locked safe behind door 5, which seems like it may possibly hold something, or is it just a red herring?