The first thing Kanji will notice as he turns the crank is that the hook unfurls and drops closer to the floor. It could serve well as a climbing rope, and with enough force, even be used to swing.

As for the crates- should either inspect them, they'd find that for the most part they are light enough to push. With enough effort, they could be lifted, or the device on which the hook is attached could turn to manipulate the boxes as well. Just a matter of fiddling with more knobs along the wall.

For the most part, it seems like an ordinary room, though. At least for now, the path to the next floor in the non-flipped tower is more or less a straight shot to the door.

The trick is getting there while upside down given their abilities and the supplies provided. It'll be a bit of a climb.