Why are people giving this not so great game a low score?

User Rating: 8 | Dash of Destruction X360
Ok, before you start disagreeing with my score (I actully I wanted to give it hire) just thing about it for a second... ITS FREE! The game is extremely short and easy and will take only about 30 minutes or less to beat both sides of the game and get 190 achievments (for the other 10 its multiplayer... please play with me :P) and to tell you the truth, its an enjoyable 30 minutes. The upgrades they give you are entertaining, and destroying a city will never get old in games. One thing is true which everyone else is saying, you wont have the urge to play it again. But who cares? Did you spend $5.00+ on it? NO! You got it for free so play it the once then take it off your 360... trust me its fun. So now due to the stupid rule of 800 characters I need to write some more, but I just tried to make my review short and free just like this game, and you will enjoy the game more than you enjoyed my review.