Henry Cavill Vibe-Coded a Game About His Superman Mustache, and You Can Play It Free

Mustache Protocol is a free browser game about the mustache that was digitally removed from Henry Cavill’s Superman in Justice League, and Henry Cavill made it. Google’s campaign page for its Googlebook laptops says he built it on his Googlebook, and you can play it on Google’s own site with no sign-up. It’s a 16-bit side-scrolling brawler.

It opens in a barbershop. The TV news says mustaches are under attack, and Henry, talking in the first person, says “I know that CGI artist...” Then you’re on the harbor street of Jersey Island, under a sign that calls it his birthplace, in gold armor with a giant comb for a sword, fighting CGI artists who come at you with scissors and picking up the mustaches they drop.

The fight moves on to a jungle with film-set scaffolding behind the trees, then to a Hollywood studio lot, where a casting agent tells him the new role “must be cleanly shaven” and offers to shave “that caterpillar” off herself. The power-ups have names: Arm Reload gives Henry super punches and a few seconds of invincibility, and Tank Attack puts him in a blue tank top under a disco ball while the bad guys stop fighting and start dancing.

How Henry made it

Google’s page has three behind-the-scenes episodes of him building it: “Every Game Needs a Hero,” “Every Hero Needs a Powerup” and “Every Hero Needs a Theme.” Android Authority reports that the episode credits the AI tools built into the laptop, Antigravity, Rambler and Magic Pointer, which makes it a vibe-coded game. GamesRadar’s headline put it the same way: Google got Henry Cavill to AI vibe code a game.

The joke is the Justice League mustache, the one that was digitally removed from Cavill’s face for the film’s reshoots. In the game, the CGI artists are the bad guys.

How to play

It’s free, with no sign-up or download. In our check on November 12, in Chrome on Windows, it loaded about 31 MB to the title screen and about 88 MB by the end of a run. Start Campaign begins the story; you get three hearts.

The game’s own controls screen lists A and D to move, Space to jump, J to attack, E to interact and Esc to pause, plus four special moves: I for Release the Hounds, O for Arm Reload, K for Tank Attack and L for Works For Me. Its settings also list gamepad and touch controls. We didn’t try it on a phone.

$11 to Movember every time you play

Google says it will donate $11 to Movember, the men’s health charity, each time the game is played from November 11 to November 30, 2026, up to $500,000. That’s the fine print on Google’s page.

Playable now

9to5Google updated its story on November 11 to say you can play it now, the day Google’s donation window opened. On November 12, @screentime’s post saying it’s playable in your browser had about 136,000 views and nearly 600 likes by 1 PM PT.