What exists

• The ship moves left and right.
• A set of meteors are randomly created (one) and then keep going in a loop.
• Pressing the space bar shoots a missile.
• Missiles are removed when they go off-screen

TODO

First priority

• Make a separate meteor class.
• Detect when meteor hits either the missile or the ship.
• Destroy a meteor (remove from world as well) if missile hits it
• Destroy the ship if meteor hits it
• Make the ship move as long as left or right key is pressed
• Put restrictions on how many missiles can be fired at any given time - may be a counter for delay.

Extensions

• Initialize with different number of meteors , and speed and even images.
• Add shield etc. you can keep on adding more stuff to game play
• Make the meteor change its image after every "n" updates
• Experiment with different kind of paths
• Provide an option in the UpDownPath to loop (or not to loop)