I just made my first really dumb game and now i want to submit it i have the wrong file extension, is this the only way that ag has to submit games, why can't their be different extensions.
To answer the original question you have to make the game in Adobe flash (a .fla file) and then use the publish settings to export your game into a .swf file. Any other file extensions won't work, basically you can't use other game programs other than Adobe Flash to make games for ArmorGames, sorry
Most websites don't accept anything but an .swf either. It's just normal practice. Having another extension is like bringing a tennis ball to a soccer game.
On another note, I just read through that, and how would you apply for sponsorship? Do you just submit and they email/mail you something? Or is there a special form?