Thank you for your in depth reply!
We really wanted to put in some low key jazzy sounding music to play along while you ride, as well as all the sound effects you described and more, unfortunately there was no time for that. Sound is usually the last thing I implement and we were still scrambling with basic features by submission time, haha. Most of our time went into visual assets (which I am glad you loved!) and the movement system on the map, with barely any time to cram the passenger pickup and delivery system in towards the end. That one is STILL a bit broken.
Thank you for your suggestions and they are already being considered in some shape or form for the next build, whenever we go ahead with it :) I loved this project and I want to polish it up a bit.
Also, glad you picked up on the spirit tracks inspiration ;)