If there's one confession you have to make to yourself, it's this: one of the primary reasons you bought your iPhone, iPod touch or iPad was to play extreme sports games on it.

With that in mind comes DMBX - Mountain Biking, the latest in a series of extreme sports games from Randerline. The game, which features 10 levels, 30 challenges and a slew of unlockable bikes and characters to choose from, also sports career and quickplay, the quickplay function allowing you to work with any characters, bikes, and levels you've unlocked at that point.

Jump into that cash money!!!

This isn't a bad premise, but the end result winds up being a mixed bag. The graphics, though decent, appear as though the designers spent more time on the levels than they did making the characters or their animated movements realistic enough to buy into. The end result is one that looks simultaneously modern and dated. The game's sound and music hold their own: a series of fun, driving rock tunes with the unmistakable "biff!!!" of a crash to indicate that you could have done something better. But the overall game environment feels rough around the edges.

You too can bike through molten lava…

The tutorial helps with basics such as accelerating, jumping and basic tricks, but it lacks a thoroughness which makes performing advanced tricks (such as full spins and vertical flips) intuitively easy. A second run through the tutorial helps, but it feels as if the game leaves you to make your mistakes and learn what you can from them.

Take a quick jump and pull up a selection of tricks to perform on the fly.

Where actual gameplay is concerned, DMBX gets fun, even if there are times where you wish you were playing against an opponent instead of just going for a high score or better time. AI-based or multiplayer opponents could only help. And the Game Center feature is yet to be functional, so however well you're doing, the world will never know of your high scores or achievements until the next version.

This, combined with frequent crashes during testing, a functional-but-awkward set of controls, and a bug that lets the character become "caught" on the level's scenery detract from the fun you should be having.

One day, you will mountain bike…ON THE MOON!!!

The bottom line. Perhaps it's the version 1.0.0 blues or the fact that the developer is working on a fairly wide library of games at the moment, but DMBX feels both incomplete and clunky. There's a decent core idea in place, and the game has its fun moments, but it also feels like this was rushed out the gate three months early when additional testing was critical.