I love this game, so far the best tower defense game I've ever played! It seems to be popular all over the net, and it's not strange considering the amount of stages, foes, power-ups and variations to the gameplay. Apart from just going through the chain of levels and reaching the grand finale at the palace there's also the challenge of getting all stars on each level, and the extra levels, not to mention the secret upgrades that specific levels contain.
The levels themselves are all strategic, with a difficulty scale that gets higher as you move along. With the right strategy it's not that much of a challenge, at least not getting the first star for each level, but it's a ton of fun watching the foes sink in a rain of arrows. I'm glad the version of this game hosted here is the one that allows saving through AG, so I can keep playing on my old campaign that I started elsewhere. :) Would be even more awesome if you could add some medals with the NG API though, maybe link the in-game achievements (that you save through the account feature) to corresponding NG medals? If you add that, then this game will be... just... well it's already perfect but that would be even more so. Keep making games like this! :D
-cd-