I'm not sure what exactly isn't working - is the camera refusing to move with the Pan Screen command? Make sure the map is large enough for the camera's movements (if you're moving 3 spaces over, you have to have 3 spaces in that direction or it won't move fully).

The best way I can think of to get the file to be small as possible - make a copy of the project folder, then edit that game so there's only one map. Make sure to take out the now-unused media files. (No need for monster PNGs unless there's a forced battle in that room, for example, or music.)

Also, make sure you aren't including the RTP. It's just one of those "make sure the computer is plugged in" sort of things - fairly obvious, but it's worth checking.