Hello !
I'm back working on Sonic Jump Anniversary ! :3
I've checked the Chinese text, and it seems like there is a confusion about the game title. You see, I named the game "音速小子飞越巅峰" and not "世嘉索尼克飞越巅峰".
I used "音速小子飞越巅峰", because this is how the game is named. However, I forgot to mention that it's a demo. I'll change that soon if possible ^^'
I will also make the Chinese names for Sonic and Shadow. The other characters names aren't necessary at the moment. But thank you anyway ^^'
By the way, I just asked to GdGohan about the "diagonal double jump", and he agrees to add them. He will try to implement them if possible.
Oh ! I completely forgot to mention that the reason why you can't see the app icon is because GdGohan uses mipmap icons, instead of traditional icons. Mipmap icons are meant to make the icon taking the whole height and width of the icon size for recent Android versions, but this type of icons have some compatibility issues. I also admit that mipmap icons aren't great ^^'