Gorillas, also known under the source code's file name Gorilla.Bas, is a video game first distributed with MS-DOS 5 and published in 1991 by IBM corporation. It is a turn-based artillery game. The game consists of two gorillas throwing explosive bananas at each other above a city skyline. The players can adjust the angle and velocity of each throw, as well as the gravitational pull of the planet. Written in QBasic, it is one of the programs included as a demonstration of that programming language.
[Source: https://en.wikipedia.org/wiki/Gorillas_(video_game)]

Here is an attempt at a near pixel perfect remake of Qbasic Gorillas in ActionScript 3.0 Source code available at https://github.com/moly/Flash-Gorillas

QBasic Gorillas - Deluxe Edition 2.2 open source: http://telcontar.net/Misc/Gorillas/