Revert "added instructions"

This reverts commit 973e5b6eb56cc8862886538b48b4d369df9bdd8d.
Revert "removed unnecessary files"

This reverts commit 8362176b002a5f1ac9395bbe4376709d76f86574.
Revert "box2d box falls"

This reverts commit d1b225244643a0c148f067d10aa2b9a61148f730.