Having bought and tried Lemmings Revolution, I found that when I re-entered the game I had to Listen to all the preamble again and had to restart from Level 1. Is there anyway to bypass the preamble and to start at a level of my choosing.
I would be grateful for any help.

By 'preamble', do you mean the intro? From what I remember, just press enter, space or escape.

 To return to the previous game, click the option below 'start new game'. I forgot what it's labelled. It's been a while since I last played.

 It's a good game though. I should start playing it again.