The game is being played on Unity 3D

You need the services of a specialist in Unity 3D game development. You need to play the game on Unity 3D. I have the source of the game, the graphics and I want to update the existing app. Platform - Unity 3d. Work through the git system (bitbucket). The project is well documented.

Details on what needs to be changed:
1. Add new cars. There are 3 views of 4 colors. 35 kinds of 4 colors. Assign them different characteristics (set in the game manager).
2. In the window of the upgrade of the car when buying a new coloring book, make sure that the new coloring book is visible before purchase (when choosing a color, the icon of the car changes accordingly).
3. Change the function of the button "pause" - make sure that when you press the game stops and the car does not go (now the movement continues regardless of the pause).
4. Add a new mode of the game "traffic" where you need to change the barriers:
- not to use obstacles in the center and on the sides (narrowing the carriageway)
Add traffic in the form of passing cars that can be crashed into.

If all goes well, I have a couple of games to play from scratch.