AI (Alien Invaders)

AI (Alien Invaders) is a single-screen shooter. The player's spaceship is constrained to the bottom of the screen and can be moved left and right. The alien invaders, always in waves of six, enter the screen from the top and move towards the player. However, they'll veer when they almost reached the player and only hurt with their shots. The player can only shoot one missile at the time towards the alien ships. It detonates as soon as the player stops pressing the shoot button and only the explosion harms the enemies. After killing three waves, the scenery changes and the difficulty rises. The player loses a ship after receiving one hit and the game ends when all are gone.