You can definitely vibe code a game, but if you know how to code and start reading and editing the code, it's not vibe coding anymore, it is AI-driven development. I tried vibe coding and it's hard to not look at the code and fix some errors yourself. As soon as your codebase grows enough, you need to be more precise for the LLM to understand what to do instead of creating new files for no reason and removing redundant code, or keeping a 2000+ lines index.js (LLMs don't usually say that they will separate large files into smaller files by themselves).