Revenge of the Sunfish

Basically, this game if you can call it that is pretty hard to explain, well, other then it being an acid or LSD trip...without the acid or LSD

The alleged story goes that superintelligent sunfish from space have invaded Earth. You, being a guy with a knife, set off to kill them.

You can find it http://db.tigsource.com/games/revenge-of-the-sunfish here.