Barrel Jumper

Barrel Jumper is a very simplistic, platformer coded in BASIC in which you have to jump over barrels and reach the top in order to defeat the giant ape that's throwing them at you...basically a very primitive Donkey Kong clone without the hammers and princess to save. It was developed by Brett Hale and published as a type-in program in the 1984 book More Arcade Games for Your Commodore 64.