Batman ATV Rider
If playing dirt bike games is your thing, check out also "Batman Truck" and "Hulk ATV" games.
What about stunts?
Sure you can do front and back flips but unfortunately doing stunts won't get you rewards or bonus points as you would expect. So that's generally not a good idea. Unless you know exactly what you're doing I would expose Batman to unnecessary risk by preforming such risky jumps. This is a big drawback about otherwise pretty decent dirt bike riding game.
10 Levels, 10 different maps
Once the level gets unlocked it remains that way so you can always get back to it (although I really don't see why you would want to do that).
Terrain topographic profile
As you will notice, there's a small 'radar' screen displayed in the lower right corner. Here you can track the current Batman's position and see how far he needs to drive until the finish, and in addition to that it also gives you a pretty detailed insight of how the track looks like. Pretty cool feature.
Nitro speed boost
When nitro symbol appears at the screen's bottom, press space bar to engage it. This immediately boosts the speed in the amount specified by the chosen ATV. You will notice that yellow ATV nitro is quite weak, but you get much better results when you go with other vehicles.
Collecting batarangs and finishing up the race as soon as possible, gives you points that you can spend on buying better ATV. You get +10 points per batarang.
There are three vehicles at your disposal. There's a yellow one available at startup and two others (the blue one and the black one) which are locked at first. To see how they ride you will have to spend 500 and 800 points respectively for purchase.