Progress

Tom Reville kindly talked me through his code today for the side scroller that he made.
The method he used was checking if the character co-ordinate was in a certain range (i.e. door space) and if the space bar is pressed then the character goes through to the next room.
I think that I would rather do a hit test, than doing the math as it is a bit easier, and we will have at least one or two doors in every room. Doing a hit test also means we can have doors in difference locations and in different shapes.
I have got the hit test working (grabbed some code from the sidecroller.fla file), so just need to do the programming to set up the room links and make the character switch rooms.