Hero of Many is a side-scrolling game featuring that silhouette style that so many indie games love these days. You play as a glowing nucleus of energy, leading a "swarm of water beings" around, fighting bad, black water thingies. They are definitely not sperm cells.
The game is played with no words, which is not a romantic metaphor. Your nucleus collects new pieces and expands, which is not a visual representation of a growth cycle.