Here's a couple of hints for improvements to your App Store listing. These are not criticisms, and I'm not trying to pick fault. These are just "if you want to do something to improve here's some ideas".
- Make the app support iPhone 6
- Make the app support iPhone 5S (64bit)
- Improve & target the icon
- Add a video
- Maybe use portrait screenshots for iPhone
To support iPhone 6 and 6+ you need to add a LaunchScreen.xib, and handle the larger screen (see the link). If you include a 64bit build you'll get iPhone5S support. These things show up on the iTunes page and in the App Store app; and may possibly affect what iPhone owners see when they browse the store.
The icon is colourful and looks good on the iPhone6+ screenshot. It just doesn't represent the game very well. The screenshots for the game say "boat combat", and I see its 17+ for frequent intense violence, but the icon doesn't say that. The candy stripes coming out of the gun, and the cute boyish figure holding it don't gel with the game play I see in the screenshots.
Icon: my game got a feature at 9th place in Paid > Games > Strategy world-wide and I got hardly anything out of that. There was a few glorious days when it was sitting next to Five Nights at Freddies. I think with hindsight its because my icon was just not good at saying what the game play was about. It shows a cute robot, but no-one knows from that what my game is (its an area-claiming game like Qix).
Doing a app preview video is a pain, and perhaps less necessary for a $0 game, but for a 60MB download, people are maybe going to want to see what it is before they invest the time.
In the app store listings if you get a minor feature, your icon is all you have going for you. Its also what most people see when they're looking at articles, review listings on websites and so on.
I'm still not sure about this one, but I have had some people who I respect tell me this, so I'll repeat it here: on the iPhone when you view a store listing, you cannot view landscape screenshots. Try it. The landscape screenshots are there, you're holding the phone in portrait, and those landscape screenshots are 90 degrees out of whack; so you turn your phone to landscape, and hey presto the screenshots turn as well and are still 90 degrees out of whack.
Look at the listing for Boom Beach - those "screen shots" are not actually screen shots as such. Its a landscape game but the screenshots are in portrait. As long as the image there is actually from in-game you can put some promo text on it and crop it to portrait and Apple are fine with it.
I wanted to respond to this because of the OP subject line, and the chance folks will come here looking for encouragement and ways to move forward. Do I even take my own advice? Yep, but I'm only a solo indie, no team - just me. It takes so much time.
I've learned a lot, and I'm working on porting my game to Android with Apportable and the SpriteBuilder plugin. I am nowhere near making enough to even pay the rent right now. But I have a list of all the things to do and its just a matter of working through them, and hoping for a turn-around.