It's a complicated topic, and whenever you talk about *-sexuality extending beyond sex you're going to attract some disbelief, but let's take a look at the at Wikipedia definition of "heternormativity":
Now, I don't really agree with most of what you get when you bring in (technically pseudo-)words like "hetero-normative". I'm likely to not see eye-to-eye with anyone who uses the word. But under the (rather worryingly) flexible definition that the people who use it tend to give it, "hetero-normative" can indeed apply to a game where the role of the male is to save the female who is helpless. In most of what I've read, heteronormativity tends to be much less about sex and more about sexual politics and gender roles.
We may not agree with the concepts behind the specific use of the word, but I'm pretty damn sure it's been used correctly. I probably shouldn't have singled you out, but I find pretty much everything about the reactions to the game (and the reactions to the reactions to the game) amusing.
Well, that's what happens when a word isn't exactly a word (I'm fairly sure you won't find it an any dictionary)...
