You have to use the WASD keys to drive the motorcycle. You ca use the mouse to see the surroudigs i detail.

Motocross Driving Simulator is a realistic motocross simulator and offers players a real motorcycle riding experience in a unique way. Designed to make you feel like a motorcycle rider, this game is waiting to welcome you into a world full of exciting rides and challenging missions.

For iOS:
Safari on iOS 8 and later supports WebGL 1.0, and on iOS 15 and later supports WebGL 2.0.

For Android：
Nearly all of them support WebGL