Mario and Sonic will destroy your touch screen
Unfortunately, the description of the game's controls is troubling for us, and probably money in the bank for companies who produce DS screen protectors. Most of the game's events are controlled by moving the stylus back and forth as rapidly as possible in a prescribed direction to build up speed or power.
It may be fun, or it may just be a shortcut to a deep groove carved into your touch screen. Between this and the DS version of the notoriously controller-assassinating Mario Party, is any DS safe?