I get to the second floor and go to the right (intending to go to use the stairs) but find that the doors are closed and do not let me go to the right. Can't figure out what I have done wrong here.
There is a switch that opens those. You'll need to find it and flick it. ;)
If that switch is [spoiler]the one left of the owl statue[/spoiler], flicking it in my room didn't open the right door - it just closed the one leading to the room of the switch. [spoiler]I was outside the room while flicking it.[/spoiler] I have the bundle-in-a-box version of the game.
Hint:
[spoiler]that switch might not be on the second floor; or the first one, for that matter.[/spoiler]