The command line options are:
||Set speed to n. 100 is normal, smaller numbers (minimum 1) are
||Use CGA graphics - this is only needed if you have genuine CGA
but the game isn't detecting your adapter properly. It nearly
||Use EGA/VGA graphics - this is only needed if you have a
genuine EGA/VGA or better but the game isn't detecting your
adapter properly. It nearly always should.
||Quiet mode, no sound after the initial ball creation on the
||Display this list.
/S is optional (you can just
specify a number) but harmless, and retained for compatibility with
Digger (another remastered Windmill game), which requires it only in
otherwise ambiguous situations.
/Q doesn't completely disable
sound, you can still toggle it with the F9