Building well
When something looks wrong
Things will sometimes come out wrong. That is normal. It is part of building, even for professionals.
Tell the AI what you see, the way you would tell a colleague: "the button does nothing when I click it", "the photos look stretched", "the prices are wrong on my phone".
You do not need to know why it is broken. Seeing it is enough. Fixing it is the engine's job.
You can always change your mind, too: "undo that" and "put the menu back how it was" are instructions like any other.