Hi Rob,
Thanks for your interest and considering entering ParserComp!
As per the response from Garry i'm afraid that, yes, we would class this as previously released. The only scenario I can envisage where we could be flexible is if a game was released and then later was so heavily re-worked as to essentially be a new game, and even then it would need careful consideration.
Hope your game design goes well, look forward to reading about it in IntFiction etc
Thanks
Adam