Ensemble has Tetris, but I know a guy who got it on his Zoomer by
downloading and and installing Geopublish (the shareware ensemble from
Geoworks). Then downloading and installing the upgrade for ensemble (2.0 to
2.1?) over the top of Geopublish. That gave him Tetris on his PC. Then he
transferred the Tetris.geo and tetris_h.000 files to their corresponding
folders on the Zoomer. It plays using the a b buttons and directional
control pad just like a GameBoy.