The kind of game that is played 100% through and players are left wanting more. Gaming hardly gets this good.
There are enough rewards accommodate any player. Tons replay value, and many difficulties to choose from and things to unlock. The game can give a sense of depth by the terms of "game play" alone, but is completely void of story. Leaving the presentation of the game a little lackluster.
The great thing about this game is the ability to use points gained during play to upgrade each type of ammo to be more effective against enemies. There are other types of upgrades that generally effect your ability to stomp your assailants.
This game is worth any price under $8 in my opinion. Fortunately it's more like $2. This game should not be passed by. Even the "Lite" version might be all you really need.
It would have a better score with a better presentation, a couple more un-lockable units and few more maps. This game could have easily been a 9.5 or better.