Kill snakes

          joystick or keyboard

                    A
            move  <   >  move
                    Z

/* * * * * * * * * * *toggle auto repeat

Space* * * * * * * * * * * * * * * *stop

Esc* * * * * * * * * * * * * * * * pause

Ctrl-S * * * * * * * * * * * * * * sound

Ctrl-R * * * * * * * * * * * * * restart

Ctrl-C * * * * * * * * * * * define keys

Ctrl-K, Ctrl-P * * * keyboard / joystick

H, V * * * reverse horizontal / vertical
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