You do not need to have a Facebook account to play Bike Race. However, some levels and bikes can only be unlocked through achievements that require a Facebook account. For example, Desert 2 and Ghost Bike can only be unlocked if you play with Facebook friends. If you have suspicions that we will post spam messages on your wall, worry no more: we won't post anything on your Facebook profile on your behalf without your express consent.
Furthermore, if you have a Facebook account, we highly recommend you to link it with Bike Race to save your progress. Saving it will allow you to play on multiple devices and to recover your progress in case you lose your device or accidentally delete the game.