"Opening Movie - Eek! The Cat" is a high quality rip of "Opening Movie" from Eek! The Cat.
The rip uses the song "The Penis (Eek!)", seeing that the song name has 2 of the 3 words, provided in the game title. From 0:04 to 0:29, the melody for that changes into Meet the Flintstones. Near the end of the rip, we could hear a Loud Nigra sigh.