While we are leaving the beasts behind we are going to keep the idea of mixing up things one more time.
Draw a background for a game (a battle arena for example). It doesn't matter if it's a side view, top down, or any other projection. What matter is, that you have to choose 3 of the 6 settings on our list and mix them up in a cohesive manner. You can choose that for example the architecture is from one of them and decorations are from the other two. You can have them layered that the foreground is from one, the next plan is from the other, and the most distant background is from the last chosen setting. You can also mix them all up without any declared system. However, it does have to look some kind of natural - like it supposed to be that way, not as just random collection of background tiles and assets. You can invent an entire background story explaining why this world is like that, but it is not mandatory. Just have fun creating a strange world after a time continuum disaster or after a clash of different cultures, separated for hundreads of years.
The 6 settings to choose your 3 from are:
1) Prehistoric tropics (Jungels with traces or presence of prehistoric animals),
2) Generic medieval-like fantasy (castles and forests),
3) Victorian steampunk (XIX century streets and gears),
4) Cyberpunk (neons city and cyberware),
5) Post-apo (deserts with makeshift huts and dilapidated cars),
6) Sci-fi (alien environments and spaceships).
You have to use the Carnival32 palette, and you have to use one of those resolutions: 640x360, 480x270, 320x180 or 240x135.