Guinea-pig Mario 1-1

An arcade game 崎山圭@iOSアプリエンジニアで工学博士で専門学校の講師をしてた built with Claude Opus 5.5. Copy the exact prompt free.

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by 崎山圭@iOSアプリエンジニアで工学博士で専門学校の講師をしてた (@sakiyamaK)FreeOpus 5.5 game prompts

@sakiyamaK built this with Claude Opus 5.5 and shared the one-shot prompt on X; it is quoted below word for word. opus5.5でモルモットのゲームを作ってって頼んだら5分でこれ... The original post had 21.3K views. English translation: “Take Mario 1-1, make the player a guinea pig, and replace the enemies with original ones.”

The prompt

マリオ1-1でプレイヤをモルモットにして敵もオリジナルに変えて

Prompt by 崎山圭@iOSアプリエンジニアで工学博士で専門学校の講師をしてた (@sakiyamaK), quoted word for word from the original post. Model as stated by the creator; your result will differ.

What’s inside

  1. Copy the prompt below, or download it as a SKILL.md
  2. Paste it into Claude Opus 5.5, ideally in Claude Code so it can write, run and test the game
  3. Swap in your own theme, characters or rules where the prompt names theirs
  4. Play it, then ask for fixes and polish in plain words

What you’ll bring

  • Claude Opus 5.5 (Claude Code, or a Claude chat for single-file HTML games)
  • A browser to play the result
  • Your own twist on the idea, if you want one

What you’ll get

  • A playable browser game in the spirit of the one above, written by Claude
  • The code, which you can keep editing

Perfect for

  • Anyone who wants to make a game without coding
  • Developers testing what Opus 5.5 can build
  • Teachers and parents making a game with kids

Also found as

opus 5.5 game prompt · claude game prompt · one shot game prompt · arcade & puzzle · guinea-pig mario 1-1

Questions

What is Guinea-pig Mario 1-1?

Guinea-pig Mario 1-1 is an arcade game that @sakiyamaK built with Claude Opus 5.5. This page quotes the prompt they shared, word for word.

Who made it, and where was the prompt shared?

@sakiyamaK made it and shared the prompt on X: https://x.com/sakiyamaK/status/2102540480009617839. You can find more from them at https://x.com/sakiyamaK.

How do I use the prompt?

1. Copy the prompt below, or download it as a SKILL.md. 2. Paste it into Claude Opus 5.5, ideally in Claude Code so it can write, run and test the game. 3. Swap in your own theme, characters or rules where the prompt names theirs. 4. Play it, then ask for fixes and polish in plain words.

Is it free?

Yes. Copying the prompt and downloading the SKILL.md costs nothing on Omo. You run it with your own access to Claude Opus 5.5.

The video and the prompt belong to 崎山圭@iOSアプリエンジニアで工学博士で専門学校の講師をしてた. Omo lists them free, with credit and a link to the original post. Creators can ask us to remove a listing at omo.space/support.