Very nice, it gives a good feel of speed, is surprisingly tricky, and is just good fun. Plus, cats. At an early stage, but I can see a really fun game coming out of it.
However, I will say that the background sound is... unpleasant. Not the music, the sound. It sounds like a mix of engine noise and hissing cats, which... I assume is intentional, but it's just unpleasant to listen to, in that I don't want to play for too long because it gets on my nerves. That's my only major complaint, though.