Hextris

A fast hexagonal take on falling-block puzzles. Plays in any browser.

Pro tips

1. Match three or more same-color blocks by rotating the hexagon to the right side.
2. Keep all sides filled evenly. Do not let one side stack high.
3. Chain clears back to back for bonus points.

Image from the project's own page, README or Wikimedia Commons, owned by its creators. Source