State descriptions:

	WAITBEGIN
		"Press FIRE to begin level %d"
	PLAYING
		Normal playfield screen, ship under player control
	ENDLEVEL
		Bonus countdown into score
	EXPLOSION
		Drifting ship pieces after death
	RESUME
		"Press FIRE to continue"
	GAMEOVER
		"GAME OVER" growing or moving up
	SCOREWAIT
		Waiting for score file lock
		"Score file busy, waiting..."
	SHOWSCORE
		"Press HYPERSPACE to start a new game"
	NEWSCORE
		Waiting for player to enter initials
	EXITING
		Screen drifting and shrinking after ESCAPE
	HELP
		Displaying help text

State entry via:

	WAITBEGIN
		SHOWSCORE - HYPERSPACE press
		ENDLEVEL - timeout after bonus countdown, ships left
	PLAYING
		WAITBEGIN - timeout, level > 1
		RESUME - timeout
		WAITBEGIN - FIRE press
		RESUME - FIRE press
	ENDLEVEL
		PLAYING - no rocks left, no saucer, not dead, no other shots
		EXPLOSION - timeout, no rocks left
	EXPLOSION
		PLAYING - explode ship
	RESUME
		EXPLOSION - timeout, rocks left, ships left
	GAMEOVER
		ENDLEVEL - timeout after bonus countdown, no ships left
		EXPLOSION - timeout, rocks left, no ships left
	SCOREWAIT
		GAMEOVER - timeout
	SHOWSCORE
		NEWSCORE - after entering initials
		WAITBEGIN - timeout, level == 1
		SCOREWAIT - scoring inhibited
		SCOREWAIT - new score didn't cut it
		NEWSCORE - timeout while entering initials
		HELP - timeout
		HELP - HYPERSPACE press
		game initialization
	NEWSCORE
		SCOREWAIT - new score made it
	EXITING
		any - ESCAPE press
	HELP
		SHOWSCORE - h press
		WAITBEGIN - h press, level == 1

State exit via:

	any
		EXITING - ESCAPE press
	WAITBEGIN
		PLAYING - timeout, level > 1
		PLAYING - FIRE press
		SHOWSCORE - timeout, level == 1
		HELP - h press, level == 1
	PLAYING
		ENDLEVEL - no rocks left, no saucer, not dead, no other shots
		EXPLOSION - explode ship
	ENDLEVEL
		WAITBEGIN - timeout after bonus countdown, ships left
		GAMEOVER - timeout after bonus countdown, no ships left
	EXPLOSION
		ENDLEVEL - timeout, no rocks left
		RESUME - timeout, rocks left, ships left
		GAMEOVER - timeout, rocks left, no ships left
	RESUME
		PLAYING - timeout
		PLAYING - FIRE press
	GAMEOVER
		SCOREWAIT - timeout
	SCOREWAIT
		SHOWSCORE - scoring inhibited
		SHOWSCORE - new score didn't cut it
		NEWSCORE - new score made it
	SHOWSCORE
		WAITBEGIN - HYPERSPACE press
		HELP - h press
	NEWSCORE
		SHOWSCORE - after entering initials
		SHOWSCORE - timeout while entering initials
	EXITING
		setup only
	HELP
		SHOWSCORE - timeout
		SHOWSCORE - HYPERSPACE press

Main ship display possibilities:

	WAITBEGIN
		recenter animation
		from-stowage animation
		center of screen
	PLAYING
		current ship location
	ENDLEVEL
		recenter animation
		from-stowage animation
		center of screen
		none
	EXPLOSION
		drifting pieces
	RESUME
		from-stowage animation
		center of screen
	GAMEOVER
		none
	SCOREWAIT
		none
	SHOWSCORE
		none
	NEWSCORE
		none
	EXITING
		none
	HELP
		none

	WAITBEGIN
	PLAYING
	ENDLEVEL
	EXPLOSION
	RESUME
	GAMEOVER
	SCOREWAIT
	SHOWSCORE
	NEWSCORE
	EXITING
	HELP