I would recommend you download an app called QooApp. It basically acts like an international mobile game play store where you can download foreign games.
This is how I get all my japanese games and updates. You have to install QooApp through an apk though thats pretty much it.
Just go to the link and download the apk first then install. Then open the app on your phone and download the games to your phone :D.
It might be thinking you have a weird connection or something. not too sure why it closes.
Ah, I'd been wondering if just installing the apk would be enough to run the game or not. I'm guessing you have to get it into your Google Play account first. You can either do it by following the tunnelbear tutorial in the wiki or through Softether VPN to proxy your PC to connect to the JP Google Play store (I used BlueStacks to install mine, so I'm not 100% sure if that will be enough or if your phone needs a JP connection at least once).
I know once it is working, you never need to worry about a proxy again for connecting; only the initial connection is a bit tricky, everything works fine through the normal Google Play store after that.
Sorry for the inconvenience, and I'll update the wiki accordingly.
Leader skill : +70 % hp for stand users and increase enemy action timer by 1
Ability : when using CS, ATK increase and CS bar filled to 33 % .
CS : I you are killed after activating the CS you return before you get killed and you give 30000 % (Max. 50000 % ) damages to enemy
Ps : if you need sone infos about coins and abilities you can join this community :
http://aminoapps.com/c/jojo-stardust-shooter/
We are currently translating coins profile for new players
Worth noting that you won't be able to bind your account to LINE later, and thus can't ever recover your account this way. Thanks for the guide though!
And here's the playstore link to Root Explorer (paid): https://play.google.com/store/apps/details?id=com.speedsoftware.rootexplorer&hl=en
And ES File Explorer (free): https://play.google.com/store/apps/details?id=com.estrongs.android.pop&hl=en
EDIT, While I'm at it: You actually can re-roll and use a LINE account (assuming you don't mind losing any contacts you have in LINE.) Go into the LINE app and under settings there's an option to delete your account along with app data associated with the account. If you do that and start LINE over, it will let you create a new LINE account with your same phone number very quickly. Then you can go back to Stardust Shooters and it will start you with a new account when you choose to login with LINE. I haven't tried that method in addition to deleting the files you mentioned beforehand but I think it might work together. Otherwise it skips the tutorial along with the first free gacha pull, not sure if it does this with your method.