Not sure if you are familiar with Reckless Racing HD for iPad, it is also available for iPhone and Android, but this one (with the HD addition) is simply amazing!

It has great graphics, sounds effects, music, enough difficulties, but most importantly, it makes you want to play it again and again, one race after the other.

I was looking for a top-down racing game for a while now, and this one is simply amazaing.

I'm playing it too, and it's pretty fun. I don't like where the gas and break pedals are, though.

Believe you can adjust the placing of the controls. Read more on the TouchArcade forum.