Discover Thumb Motorbike Racing, the motorbike racing game that can be played with the thumb in portrait mode. The game is entirely free (all extra contents in the game are free).Thumb Motorbike Racing is a motorbike racing game with 120 tracks and 40 motorbikes!Drive on wild tracks, challenge 9 opponents and try to make it to one of the 3 first places and get virtual Bitcoins!Use the money you earn in each race to buy boosters and unlock new and more powerful motorbikes! This is FREE!Thumb Motorbike Racing enables you to play on over 120 tracks split into 10 worlds with such different atmospheres, and still without having to purchase anything.If you like full and free racing games, challenges and the smell of the asphalt, Thumb Motorbike Racing is perfect for you! Key functionalities:- Motorbike racing game against AI,- Optimized maneuverability for mobile (playable with 1 thumb in portrait mode),- 120 levels with rewards,- Coins to collect in each level,- 24 motorbikes to unlock,- HD Graphics, sounds and interfaces,- Entirely FREE (no in-app purchase).