Steam is not an open platform. You can't just "sell your game" on Steam, any more than you can set up a stand in the middle of Wal*Mart and start selling your homemade kitchen gadgets. They refuse most indie games submitted to them... and it's often mind-boggling which ones they accept and which ones they reject, because it often seems random.

Anyway, I did submit it, and was rejected. Steam's policy is not to comment on why games were rejected, so I don't know why, I just know I'm in some pretty good company. But I also knew better than to plan on Steam ... if your business plan requires the cooperation of a major entity... well, it's kinda like that scene in Bill & Ted's Excellent Adventure where they are trying to figure out how to get Eddie Van Halen to play for them to make a righteous video...