Do you have good reviews? That would be the first step to establish in order to attract more downloads.

App description is important too. I was looking for a mileage tracker app yesterday and the one I chose had a simple and yet complete description to tell me what the app does.

Leveraging influencers in the field can be effective. Do you know who has a huge social media following and would likely enjoy your game? Reach out and make friends.

For organic growth, you do need to promote it through social media tools. Therefore, growing social media following is important and being a resource for IOS app development will establish the social media engagement.

Good luck!