[Nitro Here]
It's no problem! As I said, if you would add more content into the game, and maybe make it even more scarier that it currently is, you could even add a small price to it! Now, it's up to you about this, but, on the marketing part, you can get soooo much help from Facebook ads! With less than 2 euros, we got 600K for our campaign. This is money you can literally find on street! 
Now, you could use it for a free game too. There's a really cool feature in Facebook Ads which allows people to go straight to your game page and download it. It's great for brand/game awareness, no matter if the game is free on priced.
Sounds good! I'm looking forward to your reply as well! I really want to see what you think! 😄
