Version of popular food hunt, but with chars!
Following are 2 examples, more on teleranek.org:
The “Stupid mode” button toggles between ants just going straight for the food, passing through themselves, and ants having a mind of their own and trying to pass each other, like people in crowded space. Second mode though requires some patience, as it isn’t so easy for the ants to pass each other in the narrow corridors.