A shape is hidden on the screen. Find it by touch and listen. Headphones help.
Touches on the left half of the screen are the left hand (left ear, lower pitch); the right half is the right hand.
Your first five touches are the left hand (left ear, lower pitch); the next five are the right hand.
The menu (☰) can switch how touches are assigned to hands. With a mouse, hold the button and drag.