i don't know if it's allowed...technically you didn't work on THIS particular version so I'd also think its ok(although stretching the definition a bit:) ). Read again the rules...if they allow I'd say go for it, it's such a cool project that it deserves to see the end of the jam and in the end it's all about making a fun game we enjoy to which we make cool contributions. I'm pretty sure Blackthornprod would agree:)