Screenshot on Unity Play cut off

Hi there, I'm just working my way through tutorials and publish the little excercise projects. I can add a screenshot, but most of it will always be cut off. Looking at other peoples projects it seems to be a me-problem, but what could I possibly do wrong? Example: https://play.unity.com/mg/other/webgl-builds-126618 Or: https://play.unity.com/mg/other/webgl-builds-126307