Tap the numbers in order, starting from 1. The number to find is shown at the top.
A number counts when found with the first tap. After a mistake you still have to find it to go on. Each wrong tap is a miss and costs 1 second.
Endless table: a found number is immediately replaced by the next one beyond the grid (on 5×5, 26 appears after 1). The goal is 100 numbers in a minute.