It looks awesome! The only thing i would suggest is that you make your cars more realistic. add some weight to it, jeep's don't weigh 34kg and make sure the size of it is like a real jeep. But besides those things it looks great!
Cool scene! there are a lot of things you should improve though. The gear box is very under optimized. The circles should have a much higher density for less slipping. you should also rethink your gear ratios. first gear takes the car from 0-29 m/s which takes a lot out of the engine, makes slopes hard to go up, and the car accelerates a lot slower. also the car weighs 31 kg a little realism is nice
i use version 2.1.0 b5
edit: i tested with 2.1.0 and its broken and with 2.1.0 b13 and its broken there as well. i am looking for the problem
edit 2: found the problem scene fixed and updated sorry for the inconvenience. Thank you so much for telling me
Thank you!!! I know I tried my best to make it simple. It looks like a lot but you really only need a couple buttons. Some things can't really be simplified