Sure, they can build “anything”, but the quality is not good. I have recently played a few vibecoded games I found on F-Droid and the implementation sucked.
For apps, I know that the bugs and UX problems can be ironed out. Not in two hours and by the AI alone, but by days (or months, depending on scope) of manual QA testing.
Whether this is possible for games I cannot say as I have very little and only outdated experience with developing games with AI.