Some background work for Ava. The background parts move horizontally as you move forward, and shift vertically if you jump or fall a significant distance. The background is split into 3 different parts that function this way to give the illusion of space.
A lot of games do this, but if you're not sure what I mean, take a look at the way the background moves in Super Paper Mario to get an idea. When Mario moves left and right, look at how the sand dunes in the far distance seem to shift in the opposite direction.
That's the general idea of how these will be used. And it was actually a good way to learn to make horizontally seamless textures, so these square files I've made can be pasted together side by side to make long stage backgrounds.