I think you did a great work on this drawing. It is very detailed and you did great with shadows and lights.
You took time to detail all the clothes, the posters, the car, etc, etc...
The ground and the asphalt are very well done and you manage to give the car a metal aspect.
Also, I love how all the characters are moving or doing something, it's very lively. They all have differents expressions and looks (the blasé, the intrigued, the one talking, the main character struggling with the groceries....) This is very very well done!
This drawing is telling us a story, and this is what makes it great.
Maybe I would have done something to make the fox character in the center stand out a bit more from the other characters, like working with values, or with contrast... (I think his colors are more saturated than the others, but it is not enough for him to stand out)
Actually, it may be just me and I may be wrong, but I kinda feel like in this picture there is no clear main point of focus nor much space for the eye to relax; and I think keeping the higher values and/or contrasts at the foreground (main character + car) and lowering a little bit the values and the contrasts for the midground would help...
But i am really nitpicking here and also I am not sure this is relevant because It works great like that! It is at a professionnal level!
I love this pic very much and I will add it to my favorites right away!