1. As the balls are falling, tilt your phone to the right or left to make them land on the green buttons.
2. Now figure out the code.
The third equation is equal to 1. You can see that it is counting the number of angles. The first shape in the third equation is 5 angles, the square is 4 angles, so 5-4=1
Figure out the rest:
Press the keypad and enter 72112.