Riot Games have released Blitzcrank's Poro Roundup, a side-scrolling, League of Legends-themed arcade minigame thingummy for browser and mobile. The idea is you are Blitzcrank (he's a sentient golem character from the League of Legends [official site] universe) and you must save little creatures called poros (they're somewhere between a Tribble and a yak) from being eaten. It's a side-scroller where you must move up and…