I have a few games on cassette for the BBC. I have played Tetris alot recently on it and that usually takes a good few minutes to load. To keep you occupied while loading cassette games though you do have to keep hoping that the volume control is set correctly, and that the tape is still working properly (My copy of tetris is fine though because despite it being 20 years old, was only remove from it's original packaging a couple of months ago).