Hello Erkang, thank you for reading, even though it is not your first language! I understand as English is also not my first language. I now have an option to change the choices to non-uppercase, but this will be available in the next update!
Here is the option in Settings.
Here's an example of what it will look like in the game.
If the font is too small after it's lowercase, I am also going to fix changing the font size of the choices. Again, it is not in the game just yet, but when I release the update, it will be!
Thank you again so much for your interest!!! :)