Sawbuck Gamer, the AV Club's bi-weekly collection of cheap or free games, mostly for browsers and iPhones. It's where I found Canabalt (which I still <3) and there are a few others I've tried which are neat. Dig through the articles and you'll probably find something fun and unusual.
At least its not pc, although from what I understand you wouldn't be able to play far enough to get to any spoilers. So what happens that its so bad? You mention spoilers in the title so there shouldn't be any reason to hold back.