Tower puzzle hints: lever state puzzle

This page contains hints that may spoil the puzzle.

Hint 1: This is a state puzzle. Each lever is in one of two states, left or right. When you pull a lever from right to left, all levers directly surrounding it switch to the opposite state. The goal is to get all levers facing the same way.

Hint 2: This is a symmetry puzzle, so make symmetrical rather than random moves. Random moves can repeat the same move without you noticing.

Hint 3: Start from the outside and move inward. You do not have to move every lever to win, only the important ones.