Remember when we used to play games with people who were actually in the same room? Rookie Play Store developer Seabaa does. They've created DUAL!, an Android game that positively demands you play it with friends. DUAL is basically a top-down space shooter in the style of Galaga, but the structure has been modified to allow two people to play across two Wi-Fi connected devices, either competitively or cooperatively.
The primary game mode pits two players against each other.
Air Hockey would be a lot more fun if it had multiple players. And crazy Tron-inspired colors. And guns. That seems to be the basic idea behind Futu Hoki (Future Hockey, if that was too subtle), a new game from the developer of the popular Glow Hockey 3D. The new game is essentially Air Hockey squared, or perhaps Hungry Hungry Hippos in reverse: as the super-glowy guns at all four corners of the board shoot out rolling balls, you have to defend your side in Pong fashion.
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.