What they did
A Redditor who works as a surgeon and researches AI in healthcare builds video games as a hobby. For this one, a fast arcade soccer game focused on physics and speed, they used Claude Code on a Max plan, mostly with Opus models, and Claude Code wrote all of the code. The loop was simple: the poster played the current build, described what should be better, and Claude Code made the changes and tested them before the next round of play. The game runs in the browser with no signup, takes keyboard input and picks up an Xbox or PlayStation controller over cable or Bluetooth.
How it went
The game is live and free to play in the browser. Commenters called it one of the better vibe coded games they had seen and said it needed only a little more polish. The poster says online PvP still has bugs they are working through and plans a series of similar games. No time or cost figures are given.
Worth knowing
The method is play, describe, rebuild, repeat, so the human's role is mostly playtesting and taste. Physics feel and multiplayer were the hard parts; local play works while online PvP is still unfinished. The poster used Opus models on a Max subscription, so heavy iteration did not run up per-token bills.