R3volution is a rhythm-driven block matching puzzle game. Arrange 2x2 group of the same color to clear them as the needle passes, and keep moving to the solid beats the whole time.
Left and Right arrows move the piece counter- and clock-wise around the grid. Z and X rotate the piece itself, and Down drops the piece into the grid. When the needle reaches the top of the grid, all 2x2 groups of the same color will disappear.