Ok. I'll start with problematic thing and after good things
Problems:
Game info button doen't work, so I need to reload a game to get to it)
I undestand you wanted that cool GTA3 look, but it caused unreadable texts of delivery system.
I didn't understand a green balls meaning, I feel like they should be a navigational tool but they are not really helping.
Coloring of deliveries is probably intended to be different.
Radio stops working.
There is no tire sounds.
Now good things:
I really like overall graphics I think it nails a feeling of GTA3.
Figure of a passenger litterally above a car is probably a bug but it could be a feature, maybe you can scale it smaller and has reaction to driving.
Overall mechanics is working.
Making a taxi simulation is really a massive task for a single person, and I think you did your best. Thank you for sharing your work. General advise is to use FMOD for car simulators. Cause they has a complicated sound system.