http://www.stencyl.com/game/gamelist/none/newest/60 that's the link to the game on the newest section. I remember writing that review about 1 week after it was released... And I remember playing it before the jam was even announced... Yes, that's not enough proof, but I'll look into it more and give you un-deniable proof that it was released before the jam was announced.
Update!
I looked up Bot Challange on announce your game section... He never announced it... Thus, hiding the best evidence of him releasing it early... But... Isn't it strange that he might have released it on the first day, but announced it 1 day before it ends??? I distinctly remember it being realsed before it was announced... But again, that isn't considered proof.
We should ask the developer to state the truth of when he realsed it.
Also, Rob, does Stencyl not monitor the date if when games were released? Shouldn't Stencyl be able to look-up what day a game was released?
And, developer... I'm not out to ruin your game... I just think I saw this game before the jam was announced, and I don't want someone to possibly win un-fairly... If I'm wrong, I am VERY sorry...