The crate can't touch ground until it reaches the right-side island. Both snakes have to use eachother as planks to cross the gap, and the order in which they cross is important. Hope this isn't too much or too little.
That helped thank you! my specific issue was trggvat gur erq fanxr ba gbc bs gur terra bar, ohg V jnf gelvat gb qb gung gbb fbba.