Gravqx is a challenging skill game where players have to guide a ship around a set of tunnels with the mouse in as fast a time as possible, while working with and against the forces of gravity. Click and hold anywhere on the screen to thrust in the direction of the cursor - the effect depends on the distance between the cursor and the ship as well as the angle between them. Don't go overboard - let momentum take you where you want to go, and get used to slowing yourself down by thrusting in the opposite direction.