Hahaha! I remember this one: gorilla.bas, or simply "el gorilabás", as we called it here in spain. That game was on every PC on my school, and that was what mots people thought computer games where. Good thing I had the Amiga at home 
Yep - this is a QuickBasic program which came with DOS afaik and should be ultra easy to port to amig basic aswell
