Racing Fever: Moto is one of the games I've been playing in my Android phone. It's a very simple game really. You ride a motorcycle and avoid the other vehicles in the road, all while driving high speed (preferably higher than 100kmh).

If you like the game base on my gameplay video, you can download it from the link above on Google Play. It's a good game to enjoy during your free time. There's no iOS version for it though.