This is a simple little game. I do like the concept of it, and it feels like there is potential to be a very chaotic traffic management game. Currently, the game is not that difficult. It's the train that complicates the game, and makes the game more fun. I do like the graphics of the game and it looks very good. The overall vibe is also nice with the desert theme.

For some suggestions, I'd say the car should accelerate and decelerate slower, as it felt too easy and unrealistic when the car just stopped immediately when you changed the light signal. Adding a system for the car so that they might not stop in time should make the game a bit more difficult and way more fun. I would also suggest zooming out the map a bit and add more intersections. It shouldn't be done at the get-go, but if you are going to make the game longer, do consider increasing the chaoticness when the game progresses.

Anyway, I think you still did a nice job making this game. Keep up the good work!