Plenty of small little things walking arounds...
State Machines! These are what 99% of people would call "AI" which aren't. The machine doesn't learn by itself or anything, just conditions, just pure code.
This class-project was a first. I'd never done such a thing before. We all had a week to program a state machine to outwit the opponents in order to stay alive as long as possible during the "battle-royal" that was awaiting us by the end of the week.
Oh and mine is the one with the tanky one with the laser! Don't hesitate to download the build and observe those cute cubes fighting to death.