Level 1 strategy...
	Level 2 strategy...
	Level 3 strategy...
	Level 4 strategy...

Press the square second to the end. Press the third square in the first row. Finally, press the first square.

Press the second to the last square in the second row . Press the fourth square in the first row. Finally, press the second square in the second row.

Press the first square in the second row. Press the fourth square in the fourth row. Finally, press the last square in the last row.

Press the third square in the third row. Press the third square in the second row. Finally, press the third square in the first row.