diff --git a/contents/projects/festival/mf99/billiards-game/index.md b/contents/projects/festival/mf99/billiards-game/index.md
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+---
+app:
+  name: "ビリヤードゲーム"
+  url: https://billiards-game.utcode.net/
+  description: |
+    ビリヤードの3D版ソロチャレンジ。限られた打数で全てのボールをポケットに落とせばクリア。様々なギミックを攻略して、戦略とテクニックを磨こう。
+  platform: [web]
+  domain: [game]
+
+kind: festival
+status: finished
+date: 2026-05-16
+
+thumbnail:
+  src: ./thumbnail.png
+social:
+  github: https://github.com/ut-code/billiards-game
+---
diff --git a/contents/projects/festival/mf99/billiards-game/thumbnail.png b/contents/projects/festival/mf99/billiards-game/thumbnail.png
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diff --git a/contents/projects/festival/mf99/icecream/index.md b/contents/projects/festival/mf99/icecream/index.md
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+---
+app:
+  name: "アイスクリームを作ろう！"
+  url: https://icecream.utcode.net/
+  description: |
+    アイスクリームを作りながら君のプログラミング力を試してみよう！注文通りのアイスを作れるように従業員を配置しましょう。どの人をどう組み合わせるかによって、完成するアイスは大きく変わります。全部のステージをクリアできるでしょうか!?
+  platform: [web]
+  domain: [game]
+
+kind: festival
+status: finished
+date: 2026-05-16
+
+thumbnail:
+  src: ./thumbnail.png
+social:
+  github: https://github.com/ut-code/icecream
+---
diff --git a/contents/projects/festival/mf99/icecream/thumbnail.png b/contents/projects/festival/mf99/icecream/thumbnail.png
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diff --git a/contents/projects/festival/mf99/magic-network/index.md b/contents/projects/festival/mf99/magic-network/index.md
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+---
+app:
+  name: "Magic Network"
+  url: https://magic-network.utcode.net/
+  description: |
+    コードを書いてタスクを自動化し、ネットワークを構築する体験型プログラミングゲームです。現在制作中で始めのチュートリアルのみ遊べます。プログラミングで世界を動かす感覚を味わってみましょう！
+  platform: [web]
+  domain: [game]
+
+kind: festival
+status: finished
+date: 2026-05-16
+
+thumbnail:
+  src: ./thumbnail.png
+---
diff --git a/contents/projects/festival/mf99/magic-network/thumbnail.png b/contents/projects/festival/mf99/magic-network/thumbnail.png
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diff --git a/contents/projects/festival/mf99/sounddodge/index.md b/contents/projects/festival/mf99/sounddodge/index.md
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+---
+app:
+  name: "音ゲー回避アクション"
+  url: https://sounddodge.onrender.com/
+  description: |
+    ダッシュで回避！爽快音ゲーです
+  platform: [web]
+  domain: [game]
+
+kind: festival
+status: finished
+date: 2026-05-16
+
+thumbnail:
+  src: ./thumbnail.png
+---
diff --git a/contents/projects/festival/mf99/sounddodge/thumbnail.png b/contents/projects/festival/mf99/sounddodge/thumbnail.png
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diff --git a/contents/projects/festival/mf99/space-simulator/index.md b/contents/projects/festival/mf99/space-simulator/index.md
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+---
+app:
+  name: "Space Simulator"
+  url: https://space-simulator.utcode.net/
+  description: |
+    "Space Simulator"は、惑星を自由に配置し、宇宙の動きをシミュレーションできるゲームです。テンプレートから始めたり、惑星の半径や位置を調整したりしながら、自分だけのオリジナル宇宙を作り上げましょう！
+  platform: [web]
+  domain: [game]
+
+kind: festival
+status: finished
+date: 2026-05-16
+
+thumbnail:
+  src: ./thumbnail.png
+social:
+  github: https://github.com/ut-code/space-simulator
+---
diff --git a/contents/projects/festival/mf99/space-simulator/thumbnail.png b/contents/projects/festival/mf99/space-simulator/thumbnail.png
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