Before we get to the level itself, we'll have to create a way to get there! We'll need a scene that pops up every so often in our game, but isn't readily-identifiable as the portal to our secret level. Let's start by duplicating an existing scene. If you select the Rock Jump scene, and use the D key on your keyboard, you'll create an exact copy of the whole scene. Finally, rename it Rock Jump Portal. Then, move the scene down (in the scene selection window) to the end of the list. It should look like the following screenshot:
Great! So upon entering the scene, the player will believe they are just entering another rock jump scene. But let's do something more interesting here. Make the scene look like the following screenshot (using the same techniques as before):
So, here's what this obstacle is all about: it's supposed to look like a simple platform held up by narrow sticks for the player drive across the top of. But if a player hits it just right, and reverses their...