The missiles destroy the other cars if they come into contact with them, or a certain part of a wall -- how much depends on what you set the blast radius to.
By default, you have an unlimited amount of missiles, but you can turn it on so that you only have a certain amount of missiles. With that option on you can also turn pick-ups on, so you can pick up missile items.
This whole missile thing can be turned off, of course, if you desire to play the game without such obtrusions.
Things that can be customized:
missile wall length
blast radius
speed (you'll skid along the missile if you go faster than it)
time limit per missile
limit on missile amount
missile pick-ups
Thought it might be a nice idea to add some fun to the game.

