The truck drives forward by itself. You only do two things: steer and boost. The entire left half of the keyboard turns left and the entire right half turns right \u2014 so you can just slap the keyboard with two hands. Arrow keys work too. Hold Space to go fast. The blue bar is your boost — it refills on its own, and refills quicker every time you land a jump.
Stuck against something? The truck puts itself back on the trail after a few seconds. You can also tap Enter any time to do it straight away.
Mud slows you down and makes the back end swing. Rock is grippy. Grass is somewhere in between. Big tires float over the rough stuff better than small ones.
On a phone you get a big left button, a big right button, and BOOST in the middle. Turn the phone sideways for a wider view.