While playing the game i found it weird that this one and the flying lobster were paired with a knight in armor in level 01, what's the connection? So I proposed that, what if the flying lobster is a parasitic form of life that infects people then a worm like parasite makes its way to the brain of the host to consume it, slowly driving the person mad making them aggressive and then when mature enough exiting the body by ripping the head off the host and using it as a sort of armor to further evolve until it finally molts into the flying lobster. Just an idea, or maybe everything is random and the game designers liked the enemies in that order for no reason XD