Mobile game in unity, needs a few levels and script added

We have a template for unity, that works great, we require 3 levels added. We will supply the meshes.. It is a scroll script. We would like to add a force Feild script around player car that will bump other cars off the road...attained by driving over a power pill. And Oil spill script... Will cause player car to spin out of control. The levels will be loaded once a certain score is reached there will be four levels added each level will be pretty much the same the scripting only the repeating landscape will be of different meshes please note that this is a scrolling game and all the code and scripts are there for the scrolling and the repeating meshes and everything all we need is four levels designed in unity and for you to take those scripts and add the other meshes to those levels the only cooling that's going to be required on your part is coding that will be score base coating that will load the other levels and as with coding there will be an oil spill script that will cause the cards spin out of control when the script is selected and the last script would be a powerpill script causing the car causing the player car to become invincible knocking the other cars off the track it would just last for a specific time period it's just a