Finally a new tower defense game with the perfect amount of challenge. I have never written a review before, but I felt as if this game was getting a bad rap. Yes, it is difficult. Replay levels to gain gems and increase the damage/range of your towers, and you will be fine. I also enjoy the strategy involved on figuring out the best placement of towers. Where will you get the most bang for your buck? Which paths converge? A great variety of monsters to defend against, and, although I wish the spells were stronger, the types of available spells fit the needs of the game. I can't stop playing this one. :D