Prospector is an arcade game that Rainbow magazine published in their December, 1988 issue. The game is in machine language, and feature 50 levels built in. The accompanying magazine article even explained how to add your own levels to the game, using any of 16 objects: Blank, Platform, Gold Nugget, Elevator, Floater, Teleporter, Ladder, Exit, Gas Canister, Player (your start position), Igor, Grof Bin, Snarf, Ratty and End of Screen (not really an object).
Title: Prospector
Author: Lee J. Chapel
Publisher: Rainbow Magazine
Released: Dec. 1988
Requires: Color Computer 1,2,3, 32K RAM, tape or disk, joystick.