Fashionably late reply, but I think you could pull off a REALLY good horror game! I'm still thinking about the Corporate Punishment ending hours after seeing it, it made me feel a way horror hasn't in a long time.
The atmosphere, the slow deterioration of AIDA's systems. And worst of all, the realization that you, the player, made a clearly stupid choice, and have to watch AIDA wither away because of it. I like horror, (though I'm a bit of a scaredy cat) but this was really, REALLY good.
I've been staying up all night, sifting through comment threads and seeing people's reactions to it as well. The ending reminded me alot of Fear and Hunger, and how you can jump into a latrine. Upon landing, you find there's no way out. You're softlocked, and forced to restart, which is absolutely brutal. Knowing that someone would jokingly do it, only to get hit in the face with reality, and look like a damn fool.
Sorry for the wall of text, but everything was just done perfectly in my eyes, so I really think you should go for it man!
TLDR; I agree you should make a horror game, stayed up all night thinking about the Mars bad end, possible fear and hunger reference, glaze glaze glaze