Really enjoyed it, loved the zoom in and out feature. Also wasn't too easy so as not to be any challenge at all, which unfortunately is more than you can say for a lot of games these days.
I'm playing level 2 and already bored of how easy it is - as mentioned earlier you shouldn't be able to just sit there not placing any towers and still cruise through tens of rounds.
Still, I quite like the graphics.
 "Fracuum"){kind=icon}
 "Elephant Quest"){kind=icon}
 "Lab of the Dead"){kind=icon}
 "When Penguins Attack -TD"){kind=icon}