Tunnel Road is a two-input reflex game: a tunnel that accelerates continuously, obstacles arriving faster than is comfortable, and left or right as your only options.
There's a two-player mode where both players share the keyboard, which turns the endless run into a contest over who lasts longer.
Yes — two-player mode shares one keyboard, with each player dodging their own tunnel.
By lasting longer. The pace rises continuously, so the score is a measure of how long your reactions keep up.
Yes — touch the left or right of the screen. Nothing to install.