From Rafe's review:
"However, the branding in this case is relatively subtle; it never feels like you’re being hit over the head with a promotional message and does not detract from the enjoyment of the game. I would say that it’s pitched perfectly – most people will be willing to accept this level of branding, in return for a free game, and should come away with a positive brand association.
As such, companies looking into branded apps and games, of which I’m sure there will be many, would do well to regard Rollercoaster Extreme as a case study in how to get things right."