Harley's Humongous Adventure

Harley is a hip, young scientist who happens to have an IQ the size of Mt. Rushmore. While experimenting with a shrinking machine, something goes terribly wrong, the machine explodes and Harley is now the size of a bug! Harley has to find the missing pieces of his machine and reassemble it in order to return to his regular size. You'll guide him through loads of crazy capers that will lead him to the parts he needs. When you're the size of an insect everything looks humongous. (mobygames.com)