Running is a means for an animal to move on foot. It is defined in sporting terms as a gait in which at some point all feet are off the ground at the same time. Running is executed as a sequence of strides, which alternate between the two legs. Each leg’s stride can be roughly divided into three phases: support, drive, and recovery. Support and drive occur when the foot is in contact with the ground. When you facing the barriers, you can press space for the big jump, the up arrow for the small jump, do not hit those barriers, it will lose your life.