I don't know why the download returns to 13%

leave it and be patient and it will be downloaded

I dont really know i didn't have this issue but i could suggest a couple of things like... 1-try delete the game and reinstall it 2-try restarting ur network 3-try restarting ur phone ( i dont think it relates but still) 4- try diff day ( maybe the server isn't good now) Btw the game is still under development, u might face other issues , i hope that helps

I'm able to play it on my phone it works great

same here it goes back to 34mb, remaining download needed: 863mb

for me too