We decided to make a musical game somewhat like pinball. We have a pentagon-shaped field with five individual paddles (as drawn below). We will be making custom controllers (designed to look like door-handles/some other kind of flipperlike household object) and placing them in front of a screen so that people can walk by and start playing.

We will take a few songs (probably 2) and splice them into sections/divide by instruments. When the pinball hits a surface (a paddle, a wall, an obstacle, etc.), one part (or note) of the song will be played. The goal is to hit the ball at such an angle that the song's rhythm is kept the same. We might add multiple pinballs, each representing a different instrument, just to make things harder. :o)

We're focusing on interactivity; strangers can either team up to play music or keep control of the ball to play a particular tune.

As for the "rule" we are breaking, by making our controllers everyday objects, we're breaking the rule that game-like controller mechanisms are needed to control gamelike things. We are also breaking the traditional rules of pinball (being a single player game) and we're stepping out of our usual domain, working more with sound for this project as opposed to primarily visuals.