2 player game, the game context is a suburban area with 2 helicopters confronting each other. The game is played on each side of the screen there is a blue and red plane and 2 buttons corresponding to the color of the plane. (For example, the red plane is on the right side when the game starts, the plane will fly continuously to the left side. Players need to press the red button continuously to make the plane go up, the player needs to press it continuously. to bring the plane up. make the plane go up. fly up and release instead of pressing again to make the plane fall down slowly. The red plane flies all the right screen, it shows continuously on the left screen) 2 planes fly towards each other. You need to try to fly higher than the opponent to land on the front of the enemy plane, then the enemy plane will explode and you will win, the two sides of the screen will randomly appear bullets or incoming missiles, if the plane collide with a rocket, it will explode and lose, the game will last for 120s, time runs out, whoever has more points wins.

* Victory condition: highest score

* Loss condition: lower score

* How to divide LV:

- Normal: same as above

- Difficult: have more ammo. If the player eats food, the plane will shoot bullets continuously for 5s