Try to hit the driver with as many explosions as possible. Every hit and bounce increases the damage, and the long jumps are more harmful to him! The dynamite explodes automatically when the driver is close, so explode the more you can to give a maximum damage to the driver. There's 4 levels to complete.
Arrow keys to move, space bar to jump from the motorcycle. After a jump, you can make the driver rebound multiple times using the arrow keys.