help I'm a noob!

So this is my first time programming with basic, self-taught, and I'm making a Space Invaders-type program. What I would like is for there to be a short intro with a little plotline (which I've already written), and then for the game to start. Unfortunately, the script I have will go through the intro, but then will end once it gets to the game part. There's nothing wrong per se with the script I have, but I think it's missing something to make it work...is there a way to make it reset everything and start with new code (so it forgets all the stuff in the intro after the intro is over, and starts the game)?

Indentation, motherfucker, have you heard of it? Functions are nice too. I'm not spotting the problem immediately, but if you rearrange this to have a modicum of structure this should work out better.

And why the hell are you making a text game in BASIC? It's no easier than doing graphics in a decent language.