We do not accept any downloadable games. Game Maker now has the ability to port to HTML5, I believe... so we would consider a game in that format. However, I'll be honest and say that I've yet to see a game made in Game Maker that would meet the quality standards we have for games making it onto Armor.
It's a great tool to start learning how to program and make games... but if you want to start making good games, you'll need to grow past it. Best of luck!