One of the best platformers ever
As Jim you have at your disposal your trusty blaster (which can be powered up with plasma and so on) and also a whip, which is esentially, your own head.
As you play through the game you'll see many crazy worlds (such as Planet Heck), battle many weird foes (Evil The Cat & Bob The Goldfish anyone?) and launch cows into the air using fridges, not to mention using snot as a bungie cord.
If you have never played Earthworm Jim then you really should. Its as challenging as it is funny and it is VERY funny.