Trouble with camera resize on Android project

Hi everyone, I hope this is the right place where starting this thread. I follow the Build Space Shooting tutorial and I’m try to extend it for deploy it on my android phone (huawei p8) so I follow all the setting and build it successfully but when I deploy on my phone and execute it seems then camera is more closer then should be so my spaceship and enemy ship on borders right and left go outside the borders. I guess the resize it’s not automatic on Unity so based on my settings (600x900) what shall I do ? I try one script I found on the forum attached to my camera that succesfully resize my window but on the upper and lower part of the screen should put a black background (seems not working right) and one label and button placed with anchor on the top left and top right portion of the windows not being rendered currectly (should be on the corners of my camera, not on the screen size I suppose) Thank you for any help and sorry for my bad english.

little bump for me, no one have any idea for give me little hint ?