Tetris DX - Platform: Gameboy Color Expert mode ----------- Press Start to pause game play, then press Select. The preview window will not show the next piece when game play resumes. Reverse movement ---------------- Hold Left or Right while any piece except a straight bar or block is descending until it is against the wall. Then, keep holding Left or Right and rapidly tap A. Alternate screens ----------------- Allow the game to remain at the main screen until demonstration mode begins. Press Select to display a screen featuring swimming fish. Press A to return to the next part of demonstration mode, then press A again to display a screen with confetti and the Nintendo logo. Press B to return to the next part of demonstration mode, then press B. Eventually a screen featuring a blackboard will appear. In-game reset ------------- Press Start + Select + A + B during game play. Continue game play ------------------ Press Start to pause game play in single player mode, then turn off the Game Boy. A continue screen will appear when the Game Boy is turned on again. Screensaver ----------- Remain idle at the main menu for about 20 seconds. A demo game will begin. Press A and remain idle for another 20 seconds. Fish will appear. If you repeat these steps, flying triangles will appear.