In a nutshell, MotoHeroz can be understood as an even less realistic Trials HD, with more colorful levels and cartoon trucks. (And also not in HD, of course.) You have to control the speed and tilt (with the D-pad, not actual tilting, relax) of your truck to get over hills, loops and weird obstacles like land mines and breakable tracks. One-time-use power-ups allow you to jump, dash or engage another non-truck-like superpower to help reach the goal.
Oh, and sometimes the goals move around. In fact, in one track, the goal came loose and rolled around the track. This all fits into the Trials mold of a game that encourages repeated attempts in order to streamline and create a perfect run.
The utter chaos means that driving in the lead for most of the level won't guarantee you a win -- but in a funny, natural way, not through Mario Kart-style handicapping.
If you don't happen to have other heroz in your home, you can still engage in competition. MotoHeroz uses ghost data for its online multiplayer, allowing you to race against strangers' or friends' recorded runs. You can even set up "leagues" that allow you to track progress against a chosen group of players -- no friend codes required. These online races will take place on new tracks that RedLynx will continually add. The files are small, I was told, so the new tracks will just be there when you load up that mode.
RedLynx creative director Antti Ilvessuo said that MotoHeroz "has Nintendo all over it," which is why the developer designed it for the WiiWare platform. It's colorful, family-friendly, accessible, and kind of insane with friends -- sounds about right.