Seriously, this movie's opening credits are just awesome. Now, there's disagreement among fans as to which is better. The original release, which had the theme song written by Burt Bacharach, or the intended release with the original score played over it.
Here's both. Personally, I like the loopy song version the best. The undulations of the blob animation fit that music much better and it's a fun movie so, what the hell, open it with that song. Of course, I like the original score, but for The Blob, I think "loopy" is best.
First, the version with the song:
Next, the version with the score:
As the old NFL commercials used to say, "You make the call!"