It looks like someone lost a wheel from a car or truck, but it did not become discouraged, but rolled along the path, looking for a new owner if the old one could not be found. You will help the wheel not just roll, but earn coins by collecting them on the go in Endless Runner. Various obstacles will try to prevent you, such as high and low shields. You can slip under high ones by slightly changing the position of the wheel, and the wheel will easily jump over low obstacles under your dexterous control. The task is to ride as far as possible in the Endless Runner and then the wheel has a chance to attach itself somewhere.