Video below. The review is in German, but the video speaks for itself.
Unfortunately the video doesn't show off how great the game really is, as it only shows the first 2 levels, which are very basic tutorial levels. The levels after that get much more interesting, with many more gameplay elements being thrown into the mix.
Oh yes, and the video shows the iPhone version, not the HD iPad version, but it's mostly the same - the biggest difference is that the HD iPad version gives you a bigger overview of the playing area.