Ken, Sorry, I'm not very good at thinking up games. Follow the light sounds like fun to me. I have a lot of things I want to comment about your current effort, but time won't let me right now. I will tonight. Let me say this though, I think you are on the right path.

I wonder if you can do some testing for us. I want to help you get better control over the car, but need some parameters.

1. How close can you get to a wall at top speed and still be able to execute a turn?
2. How close do you want to be to the right wall?
3. At what percentage of speed can you still make a hard left without the car skiding?
4. If the Tx is NOT on, will there be any pulse from the RX?

Maybe you can put some tape lines on the floor and film that section of the floor to capture speed and distance from the wall. Of course this will be under manual control, So we will also get to see your reflexes-lol

I for 1 believe you can get the car to go much faster and be WAY more accurate!!