I think that since there's so many damn indie games coming out these days, the press really does seem to pick the winners. It seems kind of stressful in that you really need to win over the gate-keepers of the press if you want your game to reach gamers...and the reason I think is because there are SO many indie games coming out, it's hard for any single one to stick out to consumers without either it catching fire on twitter/reddit/the press.
Some of the most high profile Indie Games I found out from through other developers I follow on Twitter or games press people I follow on Twitter.
I agree with you that you need a "story" to sell your game. Luckily you've really put a lot of yourself and your personal story in the hook of the game. Also, luckily Pax is really close to release, so the game will be fresh in everyone's minds.
Honestly, I think you've made a high quality product (though keep in mind I haven't played since 0.4...I'm trying to keep it fresh and new

...I'm sure it's even better now than it was when I played last). And I think quality products have a tendency to create their own buzz.
The problem with Retro/Grade I think is by the time it released, everyone was over rhythm games. But luckily in the age of people recording themselves playing scary games on youtube (which honestly I really don't get), horror games are popular.
You're in the right genre, you've got a quality product, and you've got a hook to sell it. I think all you need is to bust your ass to get some coverage, hope some of your let's plays go viral (pewdiepie), and hope that it becomes a social media buzz, and I think you're gold.
Have you considered sending out copes to Let's Players? Does that violate some kind of ethics shit? Should I make a Let's Play? Should I write a dumb short story about how your game is haunted and post it on a creepypasta forum? I WANT YOU TO SUCCEED BECAUSE YOUR GAME IS SO GOOD.