Starting the game
Before starting the game, the players choose their colors: one is blue, the other pink.

Tap the Start button on the left of Tool Bar, and a tile with a "1" appears. If the tile is Blue, the Blue player taps the "1" and KEEPS TOUCHING the screen with their index finger. Next a Pink "1" appears, so the Pink player taps it with the index finger.

Next a Blue "2" appears, so Blue player taps there with the middle finger, while still touching the Blue "1" with the index finger. Then the Pink player does the same.
Then Pink does in the same way .....
The players continue taking turns, as the targets continue to move.
It seems to go on forever, but the game ends when one player releases their finger while a number is still displayed. You are the loser!