* show high score on title screen
* get ready/level complete break
* move sound engine to separate bank
* animations?
  * ball spinning
  * bricks exploding
  * on paddle collision
* extra lives at particular scores
* balance the game so that it's actually possible to win
  * adjust spin?
  * slow down ball speed ups?
* better makefile
* some sort of ending
* sound + music
* high score table
* power ups
  + multi-ball
  + laser
  + ball breaks through bricks without bouncing
* enemies
* indestructable bricks
* bricks that take multiple hits to destroy
* super game boy support
* borders/background
