Tap the left and right sides in turn to walk. Hold a side to lift that foot, slide your thumb to steer it, let go to put it down. Tap both at once to jump.
Every crack, line or pothole you land on breaks one of Mom's vertebrae. Ten clean steps in a row and Dad walks on her back to fix one.
Dawdle and Calzone, the Shmookies' corgi, comes to herd you. Overreach and your leg wobbles: hit Giant step to save it.