As a contractor for SuperAwesome (Epic Games) I got the chance to design and build some really cool mobile/tablet filmstrips for various clients - including in the publishing and toy space. These projects generally needed to include several things: a game/interactive element, a carousel showcasing content/products, as well as promotional video content.
These projects were always a bit of a puzzle and a lot of fun - piecing everything together in the design stages, both working from style guides as well as designing UI elements from scratch to fit, and then figuring out little workarounds for the rich-content software so that I could game-ify elements purely using animations/transitions.