From experience of driving towards the sun, you wouldn't think much of a game that focuses on flying towards the sun. But this takes place in what I imagine is a sad, dystopic future devoid of fine art or literature, and on the eve of annihilation. You're transporting yourself and a motley crew of rogues, miscreants, and not-for-the-mainstream scients in a solar-powered plane last-ditch effort to survive the imminent death and maybe save the world. Every once in a while you find these warp gates and they take you to strange lands? Are any of these places inhabitable? It is unlikely given the unsatisfactory nature of that ending. It's time to race the sun for the future of life of the planet.
Seriously though: You turn left, you turn right, you jump when you've got the right power up, and you pick up these things that make you go fast and keep the sun in the sky. If the sun sets you run out of power and die. If you run into a wall you die. You level up by doing things like not turning left for a while, or being good at not hitting stuff, or collecting a lot of stuff in the air. These levels give you things like a magnet that makes it so you pick up stuff easier, or a battery that lets you survive in the shadows better. You can also put stickers on your plane, which is the closest thing to texture you're going to get here, (well and the portals). This game is monotone polygons everywhere. Grey Triangles? Probably trees or mountains depending on scale? Grey rectangles I imagine are buildings, while Brown rectangles I imagine are also buildings. There are some that look like trees.
I filled in a lot of blanks with my imagination, and the game itself is fun.