Importing a 2013 package into Unity 6

Small Unity 6 "porting" issue with the shaders Luckly everything was unlit and easy to solve. They all came with a Legacy Shaders/Transparent/Cutout/VertexLit shader

I changed most to the Unlit/Texture shader

and some others to the Unlit/Transparent shader when transparency was important.

Also rearranged the whole scenario so it looks more with an Action Side Scroller. I didn't anticipate that some kind of wall at the back would be needed. So I moved most vegetation to the back to try and make a natural block. It looks something like this (you can compare it with the image on the bottom, which was the initial scene):