How to play
- Move and rotate the falling piece before it reaches the stack.
- Fill every cell in a horizontal row to clear that line.
- Plan for future shapes and avoid leaving narrow gaps that cannot be filled easily.
What this game practices
A classic spatial-planning challenge with useful mental-rotation practice. Increasing speed also tests motor response, so scores should not be treated as a standalone reasoning assessment.
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