So basically you have created a niche game that you are passionate about. Most of the younger generation will have likely never seen an NES so the level of fondness you have for this particular game won't run off on them. Nostalgia is the word I'm looking for. I honestly believe you create what you want no what others want. If others like what you have done then great. Try NES discords and retro gaming social media pages. Will be loads of people interested in there surely.
Viewing post in Some advice for a new developer?
I like that - I like that a lot. It is exactly what I'm thinking. I honestly believe you create what you want and not what others want. If others like what you have done then great. The only exception to that rule is if you're working for someone and that someone is paying you very nicely for your services. Then you must create what they want but hopefully their vision and your vision would be one and the same. But for oldies like me - I've made my fortune and money doesn't sway me like it used to in my younger days. I'll look into the NES discords and retro gaming pages - thanks for the tip.