Use turbo mode! Draw a track by clicking. Hold space and click to end it. R to clear the current memory and retrain the car. Play with the sliders! Turn angle is best at about 20 degrees. I found mistake distance best around 5-10. But play with them and see if you have different conclusions! This is very simple. The car adds random numbers to a list, then turns left, right, or not at all based on the number in the list, then moves forward. If it hits a wall, it deletes the last few steps and tries again. It turns pink when it reaches the end, and keeps doing the route without changing it so you can see it.
This is not a smart multi layer neural network. I don't understand those, or how to code them (I wish I did :I). This is the equivalent of a little kid pushing random numbers on an iPad until it unlocks.