How can I remove the black bars on the left and right when starting the game?
Как мне при запуске игры убрать слева и права черные полоски?
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Canipharitt please bear in mind this is an English-language forum, your posts should be in English.
Also if you're wanting help, you'll need to include a lot more information. Have a look at this thread for tips on asking for help.
I guess you are talking about letterbox scaling.
construct.net/en/tutorials/supporting-multiple-screen-77
Designing for "Scale Outer" mode is generally good.