BerryBots updates

One more thing: the physicist in me cannot understand "The wall absorbs half the force the ship exerts against the wall." How can something absorb the force? You can do it with energy, may be colloquially "absorb the speed", but force cannot be absorbed.

It is similar to incorrect use by the robocode's of the term "bullet power". It drive me nuts, it is actually bullet ENERGY.

I think you meant "the ship loses tangential to the wall velocity component proportionally to the velocity projection along the normal to the wall". I know it makes anyone to stop reading the rules right away :) May be we can say "there is a friction which is proportional to the normal component of the velocity at the contact time". But then due to friction it must loose only tangential components and the rules for the normal one need to be defined differently.