
The Game Boy and Game Gear versions are hilariously bad but it's interesting that they tried. Was a solid version back in the day as was Pitfall. It seems fine but.running a 256 color Win 95 game today isn't so simple and it's not really worth messing with.

There was also a Windows 95 version made by Activision that differs from the DOS game. Some of the later levels have curious different background work as well.

That said, it has improved colors, a cool lens flare effect in stage one, a proper transparent bonus tube, and a few other nice features. The stretched tile and sprite work due to the resolution change sucks and the audio quality (music at least) is worse and the song selection is different. The SNES version, I feel, is the worst of the early releases. If you can get it running flawlessly with a good pad, though, it had visuals in the style of the Sega CD/Genesis version but with an improved color palette (ie - less dithering). I certainly haven't achieved the perfect 60fps you get on Sega CD, anyways, it looks slightly out of sync. Unfortunately, it was a DOS game and it doesn't really run quite perfectly under DOSBOX. Now, the one that MIGHT have been best is the version included in Earthworm Jim 1 & 2 on the PC. The CD audio versions of the tracks are incredible, it has slightly more content, and it looks great. I'd say the original Genesis version is the best.For my money, it's all about Sega CD. Unfortunately the extra stage isn't very good and kind of kills the pace of the game, and the CD music is good, but doesn't loop seamlessly. There's an argument to be made that the Sega CD version is the best, as it takes the Genesis version, fixes the "one sound effect at a time" issue, and adds more content in terms of graphics, bonus stage segments, CD music, and an entire extra stage. In exchange it gets a smoother color palette and the ability to play more than one sound at a same time without it getting cut off.

On top of the resolution issue, the SNES version is also missing a bunch of stuff, including sounds, graphical effects, and an entire stage. This meant that if a game was developed for the Genesis first and then ported to the SNES, it almost always ended up cropped and stretched unless they redrew the game's graphics from scratch (which they rarely did). The Genesis generally ran at a resolution of 320x224 with square pixels, and the SNES ran at 256x224 with rectangular pixels. Which is one of several reasons the Genesis version is superior.
