Gorillas is a simple artillery arcade-style game that came bundled with installations of MS-DOS 5. It is one of three programs that were made by Microsoft to demonstrate the QBASIC programming language. Two players each control a giant gorilla and their objective is to hit each other with huge exploding bananas as many times as they can.
CoolKirby in this run blows up a gorilla in a single round in record time, with the setup for the game optimized to be as quick as possible.
The YouTube and downloadable encodes contain a very brief author's commentary in the form of subtitles.