INTRUDER -- Video game for MS-DOS-Compatible computers
        Summary of keyboard commands



        Active keys during attract mode: 

            ESCAPE - exit from current screen and display next screen
             SPACE - pause current screen
             ENTER - start game
                F1 - quit game



        Active keys during game-play:

            ESCAPE - request pause
                 R - reset/restart game
                F1 - quit game
                 M - mute (turn off) sound
             SPACE - launch missle (if keyboard selected)
             ENTER - launch missle (if keyboard selected)
             SHIFT - move ship left (if keyboard selected)
                 Z - move ship right (if keyboard selected)
                 1 - set ship speed = slow
                 2 - set ship speed = intermediate
                 3 - set ship speed = fast
                 4 - set ship speed = faster
                F5 - set game speed = normal
                F6 - set game speed = fast 1 (requires fast system)
                F7 - set game speed = fast 2 (requires fast system)
                F8 - set game speed = faster (requires fast system)
        
        Note to keyboard users:  Always use the keys on the numeric
        keypad, never use the inverted-T cursor keys.  The keyboard
        has certain hardware limitations which prevent the desired
        use of certain keystroke combinations.



        Active keys during name entry:

            ESCAPE - cancel name entry
            ARROWS - move cursor
            INSERT - insert highlighted letter



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