This package low poly models very optimized assets . It is very use full for platformers, Adventure games. I already created a sample scene with proper lightmapping .
Create your own Track using this assets package.
The package contains:
Different type of platform sets, as per ref image below
Wooden box, wooden log, trees, bushes and coins
Every asset and props included has a prefab set up for you with collider. You can create your own city using this assets package.