http://www.youtube.com/watch?v=59ug8PWcQ3E According to the video this user posted, this could be the E3 1996 build of the game... So first of all the title screen has a blue background... the level order seems to be like the one of the final game and the object placement in them is probably the same. The only big difference I saw is that aku-aku doesn't turn gold when you pick a second mask.... Oh and you can't save
I just had a play around with it, it appears that all the levels are there but the last 3. I don't know why but the last boss does not appear to load. The boss before that seems to have extreme graphical bugs. Pretty much all the levels look to be there. Interesting find though, I'm not that familiar with Crash 1.