The First 15 Minutes of Mario Kart 8 (Wii U)

Copied from LaunchBox Games Database:

The gameplay maintains the traditional elements of previous Mario Kart games, mostly from the two recent installments on the Wii and 3DS respectively. Karts can be customized once again, alongside the returning bikes, which handle similar to the karts now, and the newly introduced buggies. The hang-glider and underwater mechanics also return, as well as Coins, with the player being able to collect up to ten in one race as in Mario Kart 7.

The newest feature for the series is anti-gravitational segments, that not only allow for more dynamic track design, but also for racers to drive across walls and ceilings. When in anti-gravity, if a racer bumps into another racer, the kart spins rather than just bumping and both racers receive a speed boost. Courses from previous Mario Kart games will be included, and both the game's anti-gravity mechanic, as well as Mario Kart 7 's "air, land, and sea" mechanic will be incorporated.