Meet the Wincentration!
Put your thinking away and get your concentration on balls, when the time is over - collect all the numbers and avoid all the fire items.
Choose the game type, is is a short concentration practice for 30 second, or a normal one minute, or you are need a long run for 5 minutes.
Also chose a difficulty of a game, wether you practice with 8, 16 or 32 balls!
:)