There is a shortcut. First, jump all the little white platforms after the sign, then you will see a black cylinder. Do a spin jump an use your hover nozzle to get up there, repeat that again but in the air this time. Go over on top of the blue platforms you see now.

That's it, but the path is narrow, so be careful. At the end hop down, and you've made it!

P. S. Squirt his face, run, and then pull off his tentacles.