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               *              THRESHOLD              *
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OBJECTIVE: SHOOT OBJECTS THAT FLY AND DROP BOMBS ON YOU

JOYSTICK: 
LEFT TO RIGHT MOVEMENT ONLY

SPACE BAR: 
ENGAGES WARP DRIVE

BUTTON 0 : 
FIRES LASERS

KEYBOARD :
(F) SHIP TO LEFT
(G) STOPS SHIP
(H) SHIP TO RIGHT
(0) OR (1) FIRE LASER
SPACE BAR - ENGAGE WARP DRIVE

NOTE:
EXTRA   SHIP   GIVEN   AT  50,000  POINTS  AND  EVERY  100,000  POINTS
THEREAFTER.  MISSION  IS  COMPLETE  WHEN  LAST  GROUP  OF  ALIENS  ARE
DESTROYED. 

[ESC] - SHUTS OFF SPEAKER
[S]   - SUSPENDS PLAY
[B]   - WHEN HIT AT PROMPT FOR

PADDLE OR JOYSTICK SUSPENDS STAR BACKGROUND DURING PLAY.