The background is about China's Great Leap Forward, in 1960s after the new PRC founded. Farmers were working hard to build new lives. This game is fun and challenge for all kinds of people. Have fun!!! Features: - Easy to control, only use your 2 fingers. - 40+ levels packed with physics in 4 different scenes. - Various Tractors & Drivers. - Optimized graphics for retina screen. - Beautiful hand-painted backgrounds. Game Video: http://www.youtube.com/watch?v=tK4JInSL4SA Search on App Store with "108km" to get our other games. Produced by 108km Tech ltd. www.108km.com