Well the concept is original enough. I think that with more time and effort put into it, the presentation would be much better. Also, a "restart" button would be a nice addition.
While the graphics and animations are good, the sound design is not, and there is a surprising lack of any kind of music. Plus, the general gameplay style is on the whole part of an oversaturated genre of game.
With no innovation, no music, lackluster sound quality, and very cliched gameplay, this game gets boring and repetitive fast -- and pretty graphics won't be enough keep people playing through that.
This game is good. It doesn't bring very much new material to the table for TD games, but it does have very nice presentation, gameplay, art, and music.
Okay, whoever rated my comments down need to educate themselves. It IS a pencil whether or not you want to believe it. It's not like I was even making a damn negative comment about the game; I happen to like FPA.