Alternate title screens:
Set the system time to day or night to change a matching title screen background, or set the system date to Easter Sunday to see Easter bunnies on the title screen.
Unlockable Stages:
Unlock the following stages by performing the corresponding tasks:
STAGE – HOW TO UNLOCK
Stage 8-10 – Complete the game without losing all your lives (do not have the “Game Over” screen appear). This is a large level that is made up of all 32 levels from the original Giana Sisters.
Stage 9-1 – Complete the game without using any continues.
Stage 9-2 – Complete stage 9-1.
Stage 10 – Collect all the red diamonds in a world to unlock stage 10 in each world.
Stage X-1 – Use the warp block located directly above the starting position in stage 4-3. Note: Use bubble gum to get there.
Stage X-2 – Reach the first checkpoint flower in stage 6-7. Continue to the right until you find a bazooka bee. Bounce off its back to find the warp block to stage X-2.