Drag a bug to move it. Click the background to give some food. Observe the angle by which a bug turns quickly (often soon after eating); this seems to vary between 60° and 180°, if a bug turns quickly at all.
I use size to indicate age like in Computer Bug 2 at https://scratch.mit.edu/projects/317725/ In this remix, each bug is controlled mostly by 42 neurons, instead of the original script, so each bug's neurons can connect in different ways, and different behaviors can evolve.
