The player takes the role of Felix, a factory worker, whose job is to ensure the generator, in the bottom right of the screen, does not run out of oil.

Felix begins at the generator and must cross the conveyor belt, jumping over parcels (in gameplay similar to Donkey Kong).

The other hazard is a giant rat which occasionally runs across the screen, again knocking Felix off the platform (although unlike the gremlins, it can be jumped).

As it runs down at a fast rate, the primary objective of the game is usually to collect the oil can and return it to the generator as quickly as possible.

If Felix successfully tops up the generator with oil, the gremlins regenerate (and sometimes increase in number) and play begins again.

"It's not easy but it is fun; a fast game calling for quick reflexes and a sense of humour as you try to keep production flowing.