TetriCycle is Tetris projected onto a cylindrical surface. Rotate the cylinder left/right such that the descending piece falls into place. TetriCycle is freeware, can be distributed freely and should never be charged for.

Changes:

Handicap options (for a more competitive multiplayer experience)
Editable playfield (width, scale, position, cylindrical angle)

http://wiibrew.org/wiki/TetriCycle