VoidLoop

VOIDLOOP: Planet Defender is a playable generative UI space survival game where the AI is not just a chatbot, but the live game director. The player pilots a ship defending Earth through Phaser-powered combat while the left-side AI comms panel renders runtime-generated mission updates, AlienWiki entries, power-up choices, boss warnings, stage previews, and agent mode alerts.

The project moves beyond text chat by turning agent output into functional interactive UI and gameplay changes. Gemini generates structured JSON for stages, enemies, bosses, power-ups, story beats, and A2UI surfaces. Those outputs are validated with Zod, rendered through an A2UI-style message flow, and then applied to the game through a React/Zustand bridge. Instead of only saying “the next level is harder,” the agent actually produces a new stage plan, updates the UI, changes enemy pressure, and influences the Phaser combat loop.

VOIDLOOP also includes agent-entry modes. In Starmate mode, the AI becomes a support companion that can warn the player, mark weak points, recommend upgrades, and assist inside the rules of the game. In Voidmind mode, the AI becomes the enemy director and adapts pressure through fair boss phases, hazards, and enemy patterns. CopilotKit is used as a debug/judge layer to expose agent activity, while A2UI powers the visible generated mission and combat surfaces.

The stack is React, TypeScript, Vite, Phaser 3, Zustand, Tailwind CSS, Express, Gemini API, Blaxel subagent routes, Zod validation, CopilotKit, and A2UI-style runtime rendering. The result is an original hackathon demo where the interface responds directly to agent output: the AI generates the UI, explains what it is doing, and changes the game while the player survives.

No prior work. it was built totally in the hackathon venue.