OMG! OMG! OMG! I found it!
http://www.imdb.com/title/tt0064393/
The Green Slime
I mean, I remember the monster being actually made of goo, not being in a rubber suit; and I don't remember the legs and feet, extra eyes, the one eye being red, etc. But....there can't be
two movies with that plot.
Thanks,
madsciencewillow I probably wouldn't have found this if I hadn't have been looking at Space: 1999 stuff. It was looking promising for a while.