Thank you for sharing and giving some background on the hijab in the context of Islamic culture, which does vary quite significantly around the world.
The game mirrors situations faced by different people on the New York City subway. The choices listed in the game for why a woman might choose to wear a hijab were paraphrased from different answers that Muslim-American women gave on their personal reason for why they choose to wear the hijab, despite the discrimination they faced.A woman in Iran today would probably have a completely different answer for why she is wearing the hijab in public (e.g. she'll get fined and/or punished if she doesn't). I agree - it certainly is affected by country/laws, religious interpretation, and pressure from society and local culture.