As a mini metro & co fan I really liked what you've done! I just find the difficulty raise a bit to quickly at the point is not fun. I would like to plan a bit the lifts and get into it before that I got overwhelmed. The pleasure would be to see the ridiculous chaos going in the street with all the cars going here and there as I'd struggle to find where is the next destination.
Oh and it was a bit difficult to clearly see the shapes which doesn't help much.
That being said, it's clearly a very great proposition of game here :) Congrats