At that point, to the left of the metal boxes are more rope ladders that you can climb to get on top, and then jump to build up momentum and fly to the right. However I think I've failed in indicating this - Next time I do a platformer I should be more thorough in finding potential stuck points and unstucking them. I'm also interested to see the other wind mechanics platformer, it would be interesting to see what the games have in common and where they differ.
Thanks for playing!