Depending on the color of your costume your power will either grow and you will destroy the block with one hit, or reduce and you will need to hit it several times. Proceed to the end destroying blocks and collecting various bonuses.
Help Cleft the Boy Chin Wonder to smash blocks of different shape and color to keep moving forward and don't get locked in the structure. Use your fist to destroy those blocks and search for the ones that match the color of your uniform. You have a power to destroy them with one hit so don't waste your time and plan your path through this labyrinth.