The I/O structure is of great importance because of the reason that it makes the connection between the computer and the player. It consequently is the message of the designer sent to the player with the help of the computer. I/O is created out of input and output. The output of the game refers to the graphics and to the sound coming from the computer and the speakers. Designers are dedicated to having the graphics of games as good as they can because of the fact that people generally pay more attention to visual effects than to sound effects.

The input of the game refers to the player's interference in the game with the help of the contact that the player has with the keyboard, the mouse, or the joystick. Game designers had often failed from having a success with their games because of joysticks which had not been...
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