Here are the controls for Face Hugger's The Space Duel.

                       Player 1 (left)    Player 2 (right)
                       ----------------   ----------------
Left                   Joy. left/R/N      Joy. left
Right                  Joy. right/T/M     Joy. right
Fire rock              Joy. up/6/SPACE    Joy. up
Fire laser             Joy. down/5/B      Joy. down
Thrust                 Fire/G/SHIFT       Fire
Hyperspace             V/H                f.
Invisibility           C                  ENTER
Adjust status bars     Z,X                Cursor keys

Player 1 uses joystick 1, and player 2 uses joystick 0 (the default joystick).

Each player has two status bars representing their shield (white) and their
ability to hyperspace and become invisible (green). It is possible to adjust the
bars using the keys above. However, if you have selected the "Energy control"
option on the menu, the bars will be adjusted automatically and you cannot
control them manually.

Press P to pause the game and ESC to quit.