Earthworm Jim 1+2 are rather unique, bizarre, hilarious and fun platformers of the nineties. I recently had the knack to replay them, and found lots of things in them and about them that I had not previously known.
For PC you have the option of playing the DOS version of EWJ1, or the Windows Special Edition. The Windows version is more complete and the controls/physics are better, but the DOS version has its charm too. Just don’t try it with a gamepad, or you’ll go nuts.
EWJ2 only has a DOS version, strangely, but it is more polished than EWJ1. Both games have great CD music.