Another personal favorite!
Working again with The Playforge, backgrounds were designed for the iOS title "Zombie Farm Bubbles" for both stage select screens & active gameplay.
While initially there were core themes to be met for each stage, zeroing in on a look for the stage select would give a lot of direction for the 'interior' stage where the gameplay happens. It was an interesting and fun project, since creating one element meant deliberately considering what the inside/outside situation was like in a stage. What the contents of a cave would have, how a castle built around lava would be affected...all fun things to think about and solve!