Câu đố Level Up Puzzle

This is a quick and easy print but not so easy to solve! The goal is to get the pieces into the arrangement shown below (or remove the ring if already in that arrangement). It's an N-ary puzzle, so the number of moves grows exponentially with each additional piece added.

Here are all the pieces disassembled:

There is a groove in some of the pieces so they can slide up and down relative to each other, but not side to side. No rotation of the ring is needed to solve the puzzle - it can stay perfectly level - hence the name Level Up.