My game is cut diagonally. What can it be and how to fix it?

I did a quiz game and when I compiled for android the game was cut diagonally on my friends' cell phones, but in my it is normal. Does anyone know what is happening and how to solve it? And the functions that should be in the cut location continue to function

I made this game for a study group with my friends and I need to fix it for us to use. can anybody help me? !

![on my friends phone]: /storage/temp/88297-screenshot-20170204-212720.png [2]: /storage/temp/88298-img-20170204-wa0042.jpg ,!

! I made this game for a study group with my friends and I need to fix it for us to use. can anybody help me?