Hello! I was on tcrf.net when suddenly I found a page on VVVVVV! On that page, I came across a .zip file with two prototypes on it. Let me explain them both.
1. mechanics.swf
The game was barely there at this point of development. Nearly everything was a placeholder sprite. There are only 2 rooms in this prototype, and falling out of them will bring you to the room "Oh
****" (Yes there WERE roomnames.) Interestingly, there was an item that forces you to flip gravity in this game. No clue why it didn't catch on.
2. proto.swf
Nearly identical to the prototype released online, but there's no music.
Have fun!