Hah, fun one, I enjoyed it a lot. Great work!!
If I had to criticize it I’d say some of the scenes could be a little more dynamic (maybe some apparent slow-mo and back to full speed when they go over the turtles) and have a little more weight to them (the cars are toys I get it but they feel a tad light).
Quite cute though and a blast to watch. 
Kudos!
Oh by the way, all done in 3ds Max or?