Tap to turn. Stay on the zigzag.
A ball rolls by itself along a narrow path that zigzags up the screen — tap to swap it left or right exactly at every corner, or it rolls off the edge. Turns right on the corner are perfect and stack a bonus, gems glitter along the way, and the ball keeps speeding up while the colours change every 100 tiles. Free, no sign-up — play right in your browser.