One-touch games work great on mobile platforms - it's part of the formula that makes endless runners and Angry Birds incredibly popular. Adapting that simplicity to racing takes a little finesse, but developer Crescent Moon Games (creators of the popular Paper Monsters and Aralon games) seems to have managed it. In Slingshot Racing, all the powered sleds go at the same speed and have no steering, so to get ahead, you fire a grappling hook at a corner fulcrum to make the best line through the icy tracks. It's a lot like slot car racing, for you old timers.
The unique approach definitely takes a little getting used to.