I've been on this quest for about 20 minutes and it doesn't seem to have an end. I have 150,000 candies so far from killing the wolves, trees, etc. Am I just impatient? Another thing to note is that my screen is flooded with Octopus warriors - do they need to be out of the way for me to progress?
You have too many octopi. They'll be preventing you from moving right. I'm afraid you'll have to abandon your progress and restart, maybe without the obsidian crown? I find it easy to get through the forest with the jasper crown and enchanted monkey staff.
As a general rule, in most levels, if you can't see the background scrolling, you're not moving and the level won't progress. This is particularly relevant in the sea, where if you wedge yourself against the ground the waves of fish won't end.