We want to live in your world.
As The Creators Project describes it,
The piece is made of 21 musical swings which, when swung, sound a different note or melody. When different people play on the different swings, together they can compose a musical masterpiece. Or perhaps some form of noise art, depending on how (un)cooperative they are. It also has an easter egg function in that some of the sounds can only be played when all 21 swings are being played together.