Retro games? I think my 3D-Tetris game would fit. I know it would be the third time I participate with the same project, but this time it will be much better^^.
And this is of course a good motivation to work harder finally finish the update I announced already one and a half years ago
And I'm planning to rename it, because, as HeelX said, I might get legal problems with the name "Tetris" at one time...