Since I discovered the Primer channel on YouTube, I've thought that was just about the pinnacle of communicating behaviors of complex simulations like evolutionary ecology.
In trying to learn a little more about Unity, I also came across the fantastic Coding Adventures series, which includes a visually engaging predator-prey simulation.
That seemed like a fun launching-off point for mashing together with some first-person player interventions... so I forked the code base (GitHub) and made a few fixes noted in a helpful issues thread.
I decided to merge some of the Unity FPS tutorial assets, but switched the weapon projectiles from doing damage to delivering live-attenuated vaccines with simplified Sabin-like polio vaccine properties of shedding, reversion, immune boosting, etc. (Well... compared to actual models, mine is not very realistic, since quickly waning immunity makes it more fun to play!)
The bunnies hop around in search of food and water, but they also can now transmit infections -- both vaccine strain (blue) and reverted virulent (red) -- to other nearby bunnies!
Check it out online: https://play.unity.com/mg/other/bunny-hunt.