A good friend of mine showed me a YouTube video of this game being played. It is by far one of the most bizarre games ever created... and it intrigued me.
It's hard to tell what's happening in the game, as the levels are very inconsistent. Each level is in a sense, it's own mini game. Visuals, characters and gameplay drastically change. What I thought was pretty cool is how you progress through the game. You're given a certain amount of lives per each level, and depending if you pass of fail the level, you'll go to either Level A or B... and so forth.
It's not very easy too. You'll find yourself dying more often than... living. A lot of the levels just require you to get to the end without hitting any enemies, some are keyboard mashers, and other levels ask you stupid puzzling questions.
Psychedelic visuals, poor character animations, artwork that looks like it's been drawn by a 6 year old... Revenge of the Sunfish has it all. And it's only a puny 20 MB so even the most inferior systems can run this garbage.
Download link: http://www.thegamehippo.com/game/150
You may get an error message about a missing dll file when trying to run the game. You can download it here: http://www.dll-files.com/dllindex/dll-files.shtml?cncs32
Just put it in the same folder as the game's executable.