Hundreds, you should be a really easy game, you know? Tapping on circles to make them grow, increasing their value so everything adds up to 100. Making sure red active circles don't collide. Easy idea, easy to play, but when it comes down to actually getting somewhere, you present quite the little challenge. Part puzzle but bigger part arcade game, Hundreds from Semi Secret Software (which includes Adam Saltzman, creator of Canabalt) and Greg Wohlwend (from Solipskier team Mikengreg) is a minimalist experience that nabs your interest from the first level and refuses to let go until you've driven yourself mad with numbers and circles.