Gravity

Manage to do so, that would be all the colored balls together in your beads, and then try to bring all of this chain under the window on the way out. If you can get past the first level, then it will be easy to pass, and the second and third, and so on. But remember that you must first think carefully about your way, and then act. It is not so simple as it would seem at first glance, so that you success.