Activate the cheat correctly and an acknowledgement
will appear on screen for several seconds.

LRSCUDSC  Gremlin 11
SCDCURSL  Invisible Players
UDDRSSCC  Giants
CDDSUULR  Dwarves
LRLULRSS  Beachball
LLSRRCUD  SFA
SSLLRRCC  Ghostball
LLLCRRRS  Floodlight Failure
UDUSCUDU  Black and White