The scene is a pizza production line that packs the produced pies into boxes. Sometimes there are flies around and perched on the cake. Your task is to use the racket to racket and chase them from the cakes.

* Winning condition: highest score

* Loss condition: flies landed on pizza and was canned 3 times

* How to divide LV:

- Normal: the number of flies increases over time

- Difficulty: more and more Normal green flies appear, lay eggs and fall on the cake.