Plan a change with Brainstorm
2:19
Explore an idea, refine it in conversation, and turn it into a plan for your next edit.
Open Tools → Brainstorm when available for your account.
Editing with AI
Tell Star what to change and watch it happen. Tweak colors in seconds or add whole new features in a few minutes.
How it works
Open your game in the editor and use chat to describe one change. Each edit builds on the previous version. On smaller screens, switch between chat and the game to test the result.
After each edit, play through the part you changed. If it needs another pass, describe what happened and what you expected: “After restarting, the score stays at 10. Reset it to 0 when a new round starts.”
Find the right tool
Use the Assets tab for art and sounds, and Tools for the other actions below. Some tools appear only for supported games or accounts.
- Assets: create or find art and sounds, then reference an asset with @ in chat and say where to use it. Follow the assets guide.
- Versions: preview an earlier edit before deciding whether to roll back. Use this when a change breaks something that worked before.
- Console: inspect errors when your game does not behave as expected. Include the error and the steps that triggered it in your next chat message. Troubleshoot a problem.
- Feedback: report a problem with Star or suggest an improvement.
Ready for players? Learn about publishing and sharing. You can return to this guide from Tools → Docs & guides without closing your game.
Credits and smart pricing
Each edit costs credits based on complexity. Simple operations like changing a color or adding text cost just a few cents. Bigger changes like adding a new game mechanic cost more. Your credit balance is shown in the editor header.
Building runs on a plan, from $20/mo, with top-ups anytime.
Writing good edit prompts
Specific prompts get better results. Say exactly what you want, where it should happen, and what it should look like.
✓
Add screen shake when the player takes damage
Specific action + specific trigger
✓
Make enemies spawn faster every 30 seconds
Clear mechanic with a number
✓
Add a countdown timer. Game ends at 0. Score = items collected
Defines a complete feature
✓
The background should scroll slowly to the left, parallax style
Visual effect with direction
These work, but try being more specific
✗
Make it better
Can work, but you'll get more predictable results with specifics
✗
Add an inventory system, crafting, skill trees, and a shop
Try one at a time so you can test each change
✗
Fix it
Works if there's a visible error, but pointing to the specific issue helps
Plan a change with Brainstorm
- Open Tools → Brainstorm, when available for your account.
- Describe the idea and refine the plan in conversation before changing the game.
- Bring the part you want to build into your edit chat, then test the result.
Fine-tune with sliders
Use Tools → Tune to adjust values your game exposes, such as speed, gravity, or colors. If no controls appear, ask Star to add tunable values first. Test your adjustments and choose Save to keep them.
This walkthrough explores model positioning and sliders inside the game itself. Ask for in-game controls when players should be able to adjust a setting too.
Fine-tune your game with sliders
4:09
Adjust a model’s position, rotation, and scale while seeing the result in your game.
The video includes sliders built inside a game. For editor controls, look for Tools → Tune; use Save to keep your changes.
Editor features
Rollback
Every edit is saved. If something breaks, roll back to any previous version from the chat history. Click the rollback icon on any past edit.
Reference images
Drop an image into the chat to show Star what you want. Great for sharing a layout you sketched, a color palette, a screenshot of a game you like, or art that captures the vibe you're going for.
Model selection
Use the model picker in chat to choose a model for your next edit. Start with the default, test the result, and try another model if it struggles with a specific change. Available models can change over time.
Preview mode
Preview any past edit without rolling back. Useful for comparing versions before deciding which to keep.
@mention assets
Type @ in the chat to reference assets you've created. Star will use them in your game, whether they're images, sounds, or 3D models.
Using reference images
Words have limits. When you can show Star what you want, show it. Drop an image into the chat and Star uses it alongside your prompt.
Good ways to use reference images:
- •Sketch a layout on paper or in any drawing app, snap a photo, and drop it in. Great for UI, level design, menu structures.
- •Share a screenshot of a game you love. Star can match the vibe without copying anything specific.
- •Show a color palette or mood board. Perfect when you want a specific aesthetic but can't quite describe it.
- •Capture a bug. Screenshot what's broken and paste it with “fix this”.
There are two places to use reference images: here in the chat (to guide the game itself), and in the asset generation panel (to style a specific sprite, background, etc.). See Assets for asset-specific references.