The play field for Rotohex is a large hexagonal bin. Triangles of different colors fall from the top of the bin, and react to gravity to fall to the bottom-most centre of the bin. Using the Control Pad, players can move a hexagonal cursor around the bin, and rotate any of the triangles around by using L or R. To clear the bin, players must rotate the triangles to fit six triangles of the same color together. The hexagon then disappears, and any remaining triangles fall to the centre of the pile.
Rotohex has two special triangles that can help you as you play. If you slot a white flashing triangle into your colored hexagon, when the hexagon clears, it will also clear all triangles in the bin of the same color. If you slot a black flashing triangle into your hexagon, when the hexagon clears, a beam of light will cut through the bin, and assorted triangles will pour through the bottom of the bin for a short period of time.