The left corner of the screen is a house, on the right there will be birds carrying bombs flying towards the house to drop. On each bird there will be calculations, your task is to quickly answer the question to slide the slippers up for the bird. If the answer is correct, the slipper will hit the bird, and the bird will fall.

* Winning condition: highest score

* Losing condition: get bombed 3 times by birds

* How to divide LV:

- Normal: The speed and frequency of the bird's appearance gradually increase

- Difficult: The speed and frequency of the bird's appearance increases gradually, in this mode the screen is divided into 2 sides, the left answer the question of the bird, the right answer the bird.