Years ago, (and I might revive this too) we did pinball games. It
turned out to be a sculptural piece, with the backboard and top done in
layers of mattboard (cardboard, or scraps can be used )to build up the
"bumpers" and "flippers". I felt the pinball game had more exciting
"illustrations" opportunities, as well as the "bumpers" and "flippers"
and did not push the "rules" of making a game, if you know what I mean.
I guess a similar type of project would be to design a hand held
computer game, a mock up of which could be done again in cardboard,
keeping in mind that the hand held part could relate to the game, and
have a "mock up" screen done. (ohhh...I think I might do this)