For complex 3d graphics, if you want to make a good game with lots of features, you need to use a real game engine like Unity or at the very least if you want to do it in a browser use a library like three.js (the games I make are far simpler so I don't use many libraries)

Once you have the project setup, with version control setup, then you can start agentic development. Claude is the best in the business right now (imo), that could change rapidly though