Art, animations, controls and the environment are awesome, the music fits the atmosphere. Technically this is a superb game.
Unfortunately I didn't have the patience to get into the game itself. Having the animation shown every time you start over became annoying fast and the progress was so slow that I lost interest.
*edit* So my son took over playing after I wrote the comment and he figured out the controls better and after that we flew 1k+ that was fun. I change the rating a little bit