This is a metaphor for all of your struggles weighing you down, dark creatures swiping at you with their sharp big dealy claws.
But, with what little light you seem to have, you can find your way to overcome the darkness. Break free of the chain grasping at your arm and legs! Almost like a superhero!
If your having a bad time right now, you can take a break. Ask your family or friends to help you. It really works (most of the time).