Kudos to the developers for making this game pay-once without any freemium aspect. For a $1.99 on the iTunes Store this game is your's to play without spending a penny more.
I quite liked the artwork and style of this game, it's clean and crisp and doesn't pretend to be what it is not. There are day/night cycles too so the generated landscaped don't get boring and monotonous. There are plenty of challenges as well, from giant hills to try and pull tricks off to cliffs that will send you falling to your doom.
Here are some screenshots...