CombineRobotThis is an iOS/Android game that just released. Here's a trailer: CombineRobot.
It's a pattern matching game, basically. Giant monsters are attacking, and you matching patterns of cars on the freeway in the foreground eventually enables a giant robot to assemble and start attacking the monsters.
It gets very fast-paced as you progress, and the robots are customizable, and even though it's quite repetitive it's still entirely fun.
Here's a screenshot (shamelessly ripped from the App Store page):
If you're looking to play something on your phone/tablet, check this out.