Individual game components were implemented in progressive order, based on complexity. Major game components include: 

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- Input Manager

• Records player's key inputs

• Ability to search for specific button combinations

- Sprite/Animation System

• Created a sprite system that displays the sprite image

• Animates the sprite to display a different image at a specific time (Set series of images to cycle through and timing/speed to display the images)

• Ability to reuse sprite images instead of having duplicate images loaded at the same time

• General enough to display any sprite used in the game

- Collision System

• Created a collision system that determines collisions between missiles and collideable objects

• Determines the state of the collision (non-intersection, intersection)

• Able to be used with any collision in the game

- Shield Collision and Display System

• Shield dissolves and erodes by alien/player missiles

• Shield acts as a protector, protecting the player from alien missiles

• Drawing mechanism to show erosion effect

• Underlining collision grid and update mechanism

- Sound System

• Created a system that loads and plays static sound files

• Allows other systems to call a single play of a sound for their respective effects

• Ability to control individual volumes of each sound playing

• Allow many different sounds to be playing at once (overlapping)

• Gross sound controls (mute and game overall volume)