You can now play anything from first-person shooters to role-playing epics on mobile devices, but there's still plenty of love out there for casual time-killers. Impossible Road has recently arrived on Android after a year-long residency in the iOS App Store, and it's one of those games you can splurge an hour on at home, or poke at for five minutes on the bus. Your mission: Guide a ball down a winding track for as long as possible -- kind of like a never-ending Super Monkey Ball level, but set on the Rainbow Road track of Mario Kart legend. Admittedly, there isn't much originality to the gameplay, but Impossible Road does have a quirky and compelling visual style. You're an all-white ball in an all-white world, with the only definition and sense of space given by a ribbon-like track of changing blues that stretches to infinity below. The almost tribal techno soundtrack is a little busier than what's on screen, and it manages to match the pace of the game well, while also being a constant reminder of your inevitable doom.