This level is not actually all that difficult. Actually, the first version of this level turned out to be laughably easy, it can be solved with just 28 moves (including 18 pushes). This version is not as easy, it requires at least a hundred moves to solve, but it's still not honestly difficult.
One of the things that makes it difficult here is that there's no single-move undo. If you've made a mistake, like push a box into a non-goal corner, the only way to recover is to start over by refreshing the page.
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