Abject oriented Flash actionscript 3 game

Project description
You are required to write an object oriented Flash actionscript 3 game which:
1) displays a vehicle or character as in the traditional Space Invaders game
2) displays at least one enemy which moves across the screen automatically .When it reaches the end of the screen it should ‘wrap’ back to the beginning again
3) allows the user to control the movement (left, right, up and down) of the vehicle or character using arrow keys but the character will not go off the edge of the screen

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