For a casual game, this game is top notch. Very fun game play and well designed.
I was instantly able to get into this game straight away because of its well designed interface. Though there was nothing incredibly innovative or new to discover here, the game was well designed and very rewarding for my efforts in placing effective combinations of traps and units. I'm not a huge fan of Tower Defense, but this game offered a bit more immersion and strategy than TD did, because the protagonist is able to engage in the combat defense with a respectable degree of effectiveness. Words cant quite describe how fun this game is to play or how well they designed and implemented it. If you have doubts, try the demo. This game is a lot of fun. As for a casual game rating only, I would have given it a 9.5.