Harley's Humongous Adventure is an old school 2D platform game for Super NES (SNES). It was originally developed by Visual Concepts, and funded by publisher Electronic Arts, but eventually published by Hi Tech Expressions.

You'll guide Harley (hip, young scientist who happens to have an IQ the size of Mt. Rushmore) through all kinds of crazy capers, parachuting, using a jet pack, commandeering a tank, fighting a giant rat, that will lead him to the parts he needs.