this game does actually make sense . it's an allegory of the samsara the cycle of reincarnation. the human , the fish , the gecko, the bird, all these are stages of the protagonists existence. stages where he thrives for something to be found, only to return to a former stage of existence.
Although most of us would perceive the samsara as a blessing, it is in a sense like a prison that you can't escape. The highest form of enlightment ( hinted to, on various occasions in the game) is therefore the abandoning of this cycle. It might be just coincidence but I like the detailed symbolism in this game, the 8 which ressembles infinity is finally broken and the protagonist can leave the samsara.
well done author