There are 5 options available on the Main Menu
- No Scroll / Scroll
- Speed : Low / High
- Level : Easy / Hard
- C R T : Color / Mono
- Start Game
To select an option go up and down on the D-Pad. To change an option press button 2.
The scroll option makes the blocks built up at the bottom of the screen move along one block to the right after every piece has come down from the top. When they reach the end of the screen they then scroll through the left of the screen. It is easier to play the game with scroll off.
Choosing color means all the tetris blocks have colour. Choosing mono means all the tetris blocks are the same colour - white with a blue outline.
Not selecting any option on the main menu takes you to the control screens as outlined above, and also allows you to hear a rather nifty version of Beethoven's Ode to Joy (thanks to gameFAQs user JoniPhilips for identifying the song for me, and shame on me for not knowing it).