Add a new feature to your game. Just describe what you want in plain English — for example, "add a double-jump power-up" or "add a high score leaderboard" — and the feature will be built following your game's existing patterns.
Instructions
The user wants to add: $ARGUMENTS
Step 1: Understand the codebase
Read
package.json
to identify the engine (Three.js or Phaser)
Read
src/core/Constants.js
for existing configuration
Read
src/core/EventBus.js
for existing events
Read
src/core/GameState.js
for existing state
Read
src/core/Game.js
(or GameConfig.js) for existing system wiring
Read existing scene and gameplay files to understand what's already built
Step 2: Plan the feature
Before writing code, explain the plan in plain English:
What it does
Describe the feature from the player's perspective
How it works
List the new files, events, and settings that will be created
What it touches
List existing files that need small changes to wire in the feature
Then determine what's needed technically:
New module file(s) and where they go in the directory structure
New events to add to the Events enum
New constants to add to Constants.js
New state to add to GameState.js
How to wire it into the Game orchestrator
Step 3: Implement
Follow these rules strictly:
Create the new module in the correct
src/
subdirectory
Add ALL new events to
EventBus.js
Events enum
Add ALL configuration values to
Constants.js
(zero hardcoded values)
Add any new state domains to
GameState.js
Wire the new system into
Game.js
(import, instantiate, update in loop)
Use EventBus for ALL communication with other systems
Follow the existing code style and patterns in the project
Step 4: Verify
Run
npm run build
to confirm no errors
Confirm the feature integrates without breaking existing systems
Check that no circular dependencies were introduced
Ensure event listeners are properly cleaned up if applicable
Summarize what was added in plain English
Output
Tell the user:
What the feature does (from the player's perspective)
What files were created or changed
How to test it — "Run
npm run dev
and try [specific action]"
Tips
You can run this command as many times as you want to keep adding features. Each one builds on the last.
When you're happy with the gameplay, run
/game-creator:design-game
to polish the visuals,
/game-creator:add-audio
for music and sound effects, or
/game-creator:review-game
for a full quality check.