I've unlocked every map but still cannot beat the final car due to the controls. I was only able to pull of a perfect drift around a corner around 3 times however it's immensely satisfying when you pull one off.
Love the concept of this however I do hope that this does include graphical options later on as I wasn't able to get very far in the game due to ALOT of lag and motion blur. Great job so far though.
