I’ve had the pleasure to work with @GrouchoDuke from Acceleroto on his upcoming infinite runner, Rush City. Above you’ll see the final icon for the game. See below for a time-lapse of the artwork for the icon being created by hand from a low-poly in-game model (similar to how the Sortie icon was created).
I also did all the UI animation & design in the game. You can download it for free from the App Store.