JUNKBUBU

What if Horizon AI can generate entire game playable virtual worlds from a rough concept?

This game is 90% AI Creator Assist mode generated - from level creation to cute food design to scripting and entity assignment as well!

Inspiration

We wanted to build a world that feels like joy you can touch. Many games center on competition or survival — EAT CUTE FOOD is about kindness, cooperation, and delight. The concept began as EAT JUNK FOOD, but evolved into EAT CUTE FOOD, a brighter and more wholesome vision of play. We imagined a pastel coastline where even donuts and fries could smile, where every player’s small act of feeding joy creates ripples of color and laughter across the world.

What it does

Players explore a beachside world filled with AI-generated smiling snacks — donuts, sushi, hot dogs, fries, and fizzy donut-soda cups. They can pick up these cute foods and carry them to the glowing Junkbubu Altar on a grassy knoll.

Offering food delights the Junkbubu idol, who releases Pink Taro Pearls (joy crystals). Collecting these pearls raises the Delight Meter, unlocking new foods, sparkles, colors, and even AI-choreographed idol dances.

It’s a simple, instantly rewarding loop: grab → carry → offer → sparkle → smile.

How we built it

Every part of the world was created using Meta Horizon’s Generative AI tools: • Environment Generator Gizmo – built the entire beachside world, shacks, palms, and knoll placement. • Agent Mode – assisted in coding pickup, carry, and scoring logic. • Mesh & Texture Generation – produced every Junkbubu and snack character. • Particle Generator – added confetti and sparkle bursts. • AI Audio Tools – generated bubble pops, laughter, and gentle waves.

All content was built natively inside Horizon, optimized for smooth mobile play and fast onboarding.

Challenges we ran into

Meta horizon desktop editor is still buggy.

The Unity based Meta Horizon editor is still laggy - and lack of dockable windows, such as multiple inspector panels makes it harder. However, it is nice when horizon agent mode works.

Game objects would often go stale and require restart.

Balancing performance while spawning multiple animated AI foods was tricky on mobile. We also discovered the Environment Generator currently prefers beach scenes, so we creatively leaned into that — turning it into part of the story world. Tuning Agent Mode outputs for consistent scoring and collision handling required several test iterations.

Accomplishments that we're proud of

We learned how powerful Horizon’s new Agent Mode and Environment Generator Gizmo can be when used together — rapid iteration meets delightful emergence. We also learned that even small joyful actions — like carrying smiling fries to an altar — can create powerful shared moments among players.

What's next for JUNKBUBU

We’re expanding JUNKBUBU into a series of connected worlds: • EAT CUTE FOOD: Mountain Feast – snow mochi and ramen spirits. • EAT CUTE FOOD: Sky Picnic – flying Junkbubu idols. • Seasonal events: Taro Festival, Donut Parade, and Sushi Stars.

We also plan to integrate player-created AI snacks using in-world text prompts, letting visitors dream up their own treats.

JUNKBUBU will continue to celebrate the simple truth: feeding joy together makes every world shine a little brighter. 💖