The game kind of feels like a Tower Defense game where the 'towers' are mobile cowboys attacking the convoys that pass through between the mountains on certain routes. The pace of the game at first seems a little bit slow (like most of the tower defense games) but when you're really getting a lot of the tougher enemies choosing between getting more soldiers or upgrading the once you already have is sometimes a tough choice and really gets you going into the game.
The visual style is entertaining, and the sound design feels great and really adds up to the game.
(Note: I got this game when it was the FAAD GOLD, so it was free for me. Definitely worth to download when it's free)
In the end I guess you might enjoy this for a short while, but it'll get old in the end (4* because of that), but in-game they mention something about presenting features on facebook to them you'd like to see to be supported or added and this hopefully means they will get to crank up even more coolness into this game.