Fantastic!
One of the best games I have ever played on a mobile device.
My only issue is that some of the challenges are so overly difficult (i.e., two triple backflips in one run) that you get stuck and it wont let you go any further, no matter how far you make it or how many points you rack up.
So you end up not playing anymore, which defeats the purpose of the app. They need to have more than one way of leveling up to get other characters, such as point accumulations or distances achieved, rather than only letting you progress if you can land two triple back flips.
Would also like to see more GameCenter achievements.
sdeetz about
Alto's Adventure