Phew, that was exhausting. Not sure I made it a full ten-minute demo, since I always seem to clock in at about nine minutes on my playthroughs, but then they say developers are often poor judges of these things.
I was told it would be advisable to make a list of the event items we put in the game, so here we go:
Themes:
Forgotten Past (Roger's amnesia, natch)
Items:
Broken Glasses (Roger is wearing them)
Golden Key(s) (you need one to beat the demo)
Old music box (examine the drawers in the bloody room after getting the golden key)
Demonic possession/eyeless teddy bear (the computer that's been left on in the computer lab mentions both of these things)
And there you go! Let me know if you have any problems playing it.