Rush.

Small grids.
Short clock.

Draw one line through every square and the numbers in order,
before the clock runs out. Then do it again.

1. 1
   Start at 1

   Press the 1 and drag to draw.

2. 2
   Keep the order

   The next number has a ring around it.

3. 3
   Beat the clock

   Fill the grid to clear it and grow your streak.