This commentary originally aired March 22, 2018. Puzzle video games have come a long way since Tetris. The genre has particularly flourished on smartphones, and one of my favorites that I’ve been playing for years is called Osmos . In Osmos , you play as a single-celled organism, a mote, on a field of other motes, some of which are bigger than you, and some are smaller. The goal of each stage is to become the biggest mote. You can move around by expelling little bits of your own mass to push