Hey man - thanks for the really detailed feedback.
The rewind is very useful, it also rewinds your lap time, so it's useful for undoing mistakes or getting yourself back on track before you are killed when going off the track. Now that you mention it though, I don't think it rewinds the other racer haha!
You're not the first person to mention keyboard support. I guess I just considered racing games to be one of those no-no genres when it comes to playing with a keyboard, with the ideal situation being to have some sort of steering wheel rig. But hey, it's definitely something I could work in.
Cheers for the feedback.