Wait, eleven endings?! Hell, now I need to go try again I think I found something like five. I am absolutely having a blast with this game though, it is amazing. I thought the place you hid the key to the safe was particularly devious, but appreciate that there are two ways to achieve what getting said code allows.
On a side note, any chance of a vague nudge in the direction of how to get the ending with the redhead girl? I got to the point where she says her grandparents need her, but can't figure out what I'm missing to get past it. Unless I was supposed to wait for other events and lost patience too soon. :-)