I realized that on phone, when I switch the game to home or other application and go back to the game, it just show black screen.
Also, suggestion, I think for the save file UI, we dont need to always see the save slot name/number. Maybe its better to just compress it so we can have 2 save box on 1 row. For empty save slot, put the save name slot in the picture slot.
On current version, the choice UI has become better but some still get out of the top screen. If you want to keep the choice button on right side of screen, please add setting to allow it to be on left side.