Muscle Run is a funny 3D running game about getting big and smashing things. Your runner starts out small, but collecting energy along the track makes him grow more and more muscular.
Steer your runner along the track and grab the energy in front of you to bulk up. Use your strength to smash through walls and small obstacles. Avoid the bad obstacles that would shrink or stop you. Rush through each level and reach the end as strong as possible.
Watching your runner turn from a skinny little figure into a huge muscleman by the end of the track is half the fun, and every level adds new kinds of walls to break.