For 4 dollars, this game isn't THAT bad. Not great, but for a promotional game, it's better than some games...
Lets face it, they do not deserve a 10 out of 10, not even an 8 out of 10... but for 3.99$ USD, Pocket Bike Racer isn't THAT bad. It's not great, but it's just about "Good".
Since it plays on both the 360 or original Xbox, it's not going to have phenomenal graphics. Think PS1 era graphics and details, just with less jaggies and more colors. The arenas range from a parking lot with jumps and tires and bales of hay, to a construction site (which is the best looking, yet hardest course in the game), to a "Burger King Garden", which I must say makes me want to eat a Whopper right now (no, this game is not inspiring me to buy Burger King products, I'm already a fan of the King).
The characters aren't very detailed, but passable, especially for a budget game. You can be the King, Brooke Burke, The Chicken, and some other random BK related characters. Neither is better than the other, the only thing that separates any player from another is the bike they choose and their skill.
The gameplay is somewhat like Mario Kart, where you have 8 racers, racing for points. The most points wins, and each corresponding finish gives you X points. You can drive through little firey check points which give you some "boost" in your power. This gives you nitrous and a Missle weapon for some reason. I'd think throwing a Frosty Drink or Whopper in your opponents face would be more effective and realistic, but hey, I didn't program it. At highest level you can get an attack that allows you to shine the Sun in everyone's eyes and have them drive off the road.
None of the tracks are particularly long, and there are only 5 tracks, total, so don't expect a lot of diversity or replay value other than winning new bikes or getting achievements.
There really isn't much sound, nor a catchy soundtrack, but I guess for 4 dollars it works in the end.
My little brother really likes the game, and has put in a good 10+ hours for it in addition to my play time, and for 4 bucks, I really have to say that's a pretty good value. Basically, don't expect the world from a 4 dollar game you buy at Burger King and you might be amused for a while.
But don't rush out to buy an Xbox or Xbox 360 for this game...