Really funny idea, and it's nicely put together for a game made in the last 24 hours of the jam. It would be interesting to see what it could become if you keep working on it!
The start feels really slow, though. It took several seconds just to spawn a single spermatozoid.
Also, as Bhijn already said, you should consider porting the game to the web. People are lazy (myself included) and tend to play web games more easily on Itch, especially small arcade ones. It’s a simple way to get more people to try the game and for you to get feedback 🤔