I already have Jazz Jackrabbit 2 - The Secret Files, I haven't played it recently though (computer crash, always a joy :-( ) Maybe the levels I mean are included with that, but I really think we had a seperate game on sale back then, which included Easter levels (with the Lori character, I never managed to get passed the first level though, Jazz and Spaz were able to jump higher), where you had to collect eggs. Very windy entrance. But that was also just a few levels and then you got a password to download some more levels on the website that didn't excist anymore.
But maybe I'm mistaken and are those levels part of the Secret Files...