ifteen years ago in Malmö, Sweden, animator Simon Flesser and programmer Magnus “Gordon” Gardebäck left their jobs at the now defunct games studio Southend Interactive to strike out on their own. Tired of the fussy nature of console development, the pair would stake their claim on Apples App Store, which in 2010 was regarded as one of the most exciting frontiers in games. Mashing their names together to form a portmanteau, Flesser and Gardebäck became Simogo, and a consistently wonderful and...