How to play
- Choose a container, then choose a destination with space and a compatible top layer.
- Group matching colors while preserving at least one useful empty container.
- Finish with each non-empty container holding only one color.
What this game practices
A readable sequencing puzzle with reversible early moves and constrained later choices. It relies on color recognition, which may require accessibility improvements for some players.
How we checked it
Open-source HTML5 game reviewed in the local coolmath build for startup, primary controls, restart flow, narrow-screen fit, console errors, failed requests, and third-party network activity. Upstream telemetry is disabled in this self-hosted copy.
Open-source license and attribution
This self-hosted game is adapted from Web Games by mashukui and distributed under the MIT License. coolmath disabled upstream telemetry and records its local changes in the open-source notices.
Reviewed by coolmath Editorial Team · Updated 2026-10-09