Two plus two: math puzzle game

Two plus two is a math game where you tap two numbers to make an addition, subtraction, multiplication or division correct. The numbers are on the blocks that are falling from the top of the screen at increasing speed. If the blocks fill the entire screen the game is over. There are two modes: easy (addition and subtraction, more time between falling blocks) and hard (addition, subtraction, multiplication and division, less time between falling blocks). Stay focused and good luck!