Begin by selecting your crab from the character selection. Move your crab using the movement controls to locate a shell for protection. Pick up fish scattered on the ground to grow your crab's size and strength. Check out the store to improve your crab with faster legs. Battle weaker opponents by attacking them to knock out them from the match. Participate in the tournament to challenge against opponents. Utilize the reward system to claim extra rewards. Adjust your tactics based on your crab's skill and the competition you face.