Imagine also that each view at eacho rientation is roughly the same, except that the door changes. In this case it would be far better to employ a single background sprite and 4 door sprites, rather than creating 4 full screen images. Note the use of custom cursors. I've included 3 sounds in the movie. They push up the file size a fair bit, but this is not really a problem within the limits I've set for your projects.
Sound is crucial.
I'll say that again. You must spend time working on your soundtracks. I've allocated channel 1 to looping sound that is placed in the score. But it's up to you how you allocate the channels. Speak to the technical staff if you have problems working out how to do this.