Drive around many detailed levels and complete each defined goal. Some levels require you to park (stop completely when the box is green, face the direction of the arrow). Others have a circular goal you have to touch. Follow the white arrow if you are lost. Each level has completion time record. You can view all records in the settings page. Why is this game so hard? The title says it is a challenge, therefore that's what you are going to get. WASD or arrow keys to drive. [Q] to attach/detach trailer when stopped underneath. Space (optional) for brakes. R to reset level.