I did a test in the GameDev.tv Halloween jam where I used LLM-generated music. But I had spent 6 months playing with the tool and I tweaked a lot of things and wrote my own lyrics and had a clear direction. I then played like 150 games in the jam so I could find out what people thought about my use of AI. 70 people rated my game. I managed to come in 12th Overall and 12th in Music. I got 66 comments, and some very long discussions on the use of AI in games, specifically from people who are musicians for a living. You can read those here if they're of interest to you.
We have spent a lot of time over on the Godot forum talking about LLMs and their use in making games - which is pretty non-existent. If you use an LLM to code your game, it will inevitably have problems that the LLM cannot help you fix. At which point you'll have a mess of spaghetti code that you cannot understand. If you try to ask for help, people will be able to tell by reading it that it's LLM-generated code, and may decide not to help you with it at that point. Even if they do, a game jam is not the time to be waiting for a reply on a forum or discord for someone to help you debug code you don't understand yourself.