Full Power
This code will let you restore your power whenever you
are "blinking" (when the game starts or you've detonated
your probe). To do it, press Up, Up, Down, Down, Left,
Right, A, B.

Level Select
On the "Stage Start" screen, highlight any stage, then
press A+B+C+D simultaneously. When the game begins you
will start 4 levels beyond the location you rquested.
For example, if you highlight stage 1 you will start
on stage 5.

Original Demos
At the title screen tap Left 7 times then tap Right once.
Now pressing A-D on either controller will show the
corresponding cinema.
Pad 1 = cinemas 1-4,
Pad 2 = cinemas 5-8.