Endless flyer games continue until the player loses. They do not feature distinct levels; instead, we will design encounters (my own term) for our protagonist penguin to explore. We can create an endless world by stringing together encounters one after the other and randomly recycling from the beginning when we need more content.
The following diagram illustrates the basic concept:
A finished game might include twenty or more encounters to feel varied and random. We will create three encounters in this chapter, to populate the encounter recycling system.
We will build each encounter in its own scene file, in the same way we would approach a separate level in a standard platformer or physics game.