The world of free iPhone games is getting more interesting, as brands of all kinds wake up to the promotional opportunities of giving away a game on the App Store.
The latest is called RhinoBall, and it's been released by Disney to promote the film studio's new animated comedy BOLT.
The game, developed by AvatarLabs, owes just a little to Super Monkey Ball. You have to roll a hamster in a ball around a city to find a dog called Bolt, using accelerometer controls and picking up lightning bolts along the way.
The interesting thing is the game's production values high and the way it includes video clips from the film alongside the core gameplay.
Traditionally, movie games on mobile have been offered as premium products, so it's fascinating to see a studio giving away a game on the App Store instead.