Various cheats
     Type  the  following  codes  while  you  play [type them again to
disable the effect]:

Cheat code:             Effect:
oldskool                Classic-style gems
blackandwhite           All gems lose color
greenscreen             Everything goes green
slomo                   Everything goes slow
amberscreen             Everything turns amber
normal                  Game returns to normal colors
colorswap               Gems switch colors
network                 Matrix style background
nausea                  Wobbly background
noframe                 Hide/Show the Game Borders
xmas                    Switches Background to an ice-type planet & snows
starfield               Switches the Background to Space