I highly recommending trying the program for yourself: link
Note: some antivirus software complains about this. It is not a virus.

In 87kb, Peter Sotesz creates self balancing automatons whose sole purpose is to knock each other over. The game is complete with breakable walls and secret mode. I chose this as for my Looking Outwards because I think it’s a great demonstration of entities behaving according to rules within a prescribed universe, in this case, blocky ‘people’ attempting to push each other to the ground, with the universe following the rules of Newtonian physics.