You can also use the keyboard

arrows

to navigate, the

space bar

to place a stone, and

M

to toggle the sound.

Cyx is a geodetic

TIC TAC TOE

Make one of the four shapes
before your opponent does.

Keep your hand steady for a few
seconds to play on the selected tile.

Move your hand as if you were
caressing the geode to rotate it.

Make one of the four shapes
before your opponent does.