"Cool pattern! I have been crocheting for many years and found the pattern to have a notation in the stitch dictionary that gave me pause. (In the Cluster stitch, "pull through stitch" is usually "pull up a loop".) In the Tentacles and Suckers notes, it says, "With outside of hat facing you," it might be helpful to add something like, "just as if adding another round." Also, when putting on the suckers, it might help to emphasize that you will also be starting on the right side of the hat (using the same beginning stitch as the tentacle with the same number, but working the back stitch). After looking at it a few minutes, I was able to figure it out, but with a special hat like this, every helpful hint counts."
Updated Crochet Octopus Hat Aka Twisted Kraken PATTERN (pls read description before buying)