|An awesome prototype I picked up on ebay some years ago, forgot what I paid for it but probably in the $200 range. It's an awesome piece of SSSV history as this is an unfinished version known as 1.26B|
It has noticable differences even in the intro so I'm guessing this build is before they got around to polishing up things and adding animated logos and such (as they are missing). I don't know about the levels as I haven't played a lot of them and no debug menu has been found either.
The prototype has been tested a lot as all 4 save slots contains saves - all at different stages in the game.
PURE AWESOMENESS! :-)