Train Overpass

Hmm, still not completely sure if you intend this, but

Spoiler

now B can use the ball to fall off the top platform and walk to the win. I think this might be what you wanted, since the rest is pretty much unpassable by conventional (i.e. no tricks) means.

@Don G Rowe
I think this (in spoiler) is the only possible solution.

Ditto and I don't like soccer!

@Don G Rowe Yes, that was my intention, but I guess it's too easy right?

Easy is a term relative to experience. For those who know the tricks it's pretty obvious, but it would appear impossible to others. My only complaint would be that it makes the rest of the level a red herring, and

Spoiler

using the ball isn't the only way to accomplish the fall.

Took me a moment (half way down the stairs) to see the solution. From that point it was pretty easy. Thanks!