New game features to be agreed

Start Game: When the game loads the player will be presented with a main menu. You will have the option of one or two player, Options, Instructions and exit. Under the options sub menu will have, sound effects on or off, music selection or music off, and game difficulty. The player will have to select one or two player to start the game.

Move Aliens: The aliens will move left and right and slowly descend at either side of the screen. Each alien is animated and will randomly drop bombs on the spaceship, one bomb at a time.

Move spaceship: The player can move the spaceship along the bottom of the screen, left and right only. The spaceship can fire a maximum of three bullets at a time unless they have collected a power up which allows them to fire more.

Kill Aliens: To kill the aliens the player must shoot them using the gun of the spaceship. The player can only fire a maximum of three bullets at a time upwards at the aliens. One bullet will kill one alien.

Win Game: The player must kill all the aliens by shooting them before they reach earth. The player has three lives to kill all the aliens unless they collect more lives from the power ups, once all the lives are gone the game is over.

Levels: The player will advance to the next level when you have killed all the aliens on that level. The speed of the alien decent will increase every level and the number of aliens will also increase every 3 levels. The game pauses at the end of the level, where the player presses a key to start the next level.

Music: Background music will play when the game loads and the main menu is showing. Music will also play while the game is being played unless it is turned off. The player can select different music from a list found in the options sub menu. The player can also chose to have music off.

Sound Effects: Sound effects will play when the spaceship fires, when the spaceship moves across the screen and when the aliens drop the bomb. The sound effects can be turned on or off before starting the game found in the options sub menu.

Score: Keeps a score to let the player know how well they are doing, aliens are worth 100 points, mother ships are worth 250 points.

High Score: The high score keeps track of the highest score achieved during the game. The highest score will be saved and displayed on the screen. For two player the highest score of each player will be recorded.

Instructions: The player will find a list of instructions on the main menu which will describe the purpose of the game and also how to play the game including controls.

Two players: The player can select one or two players, another player will be needed for two player. They will work together to kill the aliens but have separate scores. If one player loses all their lives they are out the game, if both players lose all their lives the game is over. Each player will have different controls on the same keyboard to move and fire.

Power ups: The player can collect 'power ups' which will be randomly dropped. These will be one of the following; extra lives, temporary extra bullets and a temporary shield. The player can collect a maximum three power ups at a time.