If you haven't seen that yourself yet I suggest firing up the free, no registration required GLM-4.5 Air on https://chat.z.ai/ and seeing if you can prove yourself wrong.
It works for me on the architectural level, but does not change the fact that your expounding on prior information and not a new one.
Not sure though why I’m getting downvoted.
Then you said: "none of these can create anything I have not spent excessive amount of time explaining"
Presumably then they CAN create a game they have never seen if you spend an "excessive amount of time" explaining that game?
So are you talking about game design here? It can implement anything, but it can't design entirely new games without human input?