Audio Surf on sale again! (Also how to get the Sunburn Achivement)

Well, not again during this sale, but Audio Surf is constantly going on sale is what I'm getting at. I personally think it's because it's a fun game but I could never bring myself to spend ten bucks on it, but anything less than $2? Sure thing. But anyway, first things first, quick summary of the game, followed by how to get the achievement for the summer sale.

So if you're just interested in the achievement and not the basics of the game, just scroll down to the big bold text.

I'm so good at matching colors.