AppAdvice writes: "Genius Defense Force is a brand new game coming form Clickgamer. It's a brain teasing game combined with defense style. Your objective is to solve math problems to blow up asteroids that are coming straight towards Earth.
Each asteroid has a number, and you're given three numbers and two equation symbols to try to calculate that number. For example an asteroid is 6 with numbers 3, 2, and 9 with x and / and you try to reach 6. So it would be 9/3 x 2 = 6.
30 levels are included with increasing difficulty, and each level is graded A-F based on how many asteroids hit earth. Every level requires you to add, subtract, multiply, and divide your way to blast asteroids."