On the LG G Watch R, with Gyro effect set to -15, the effect of motion on the Y axis is the opposite of that on the X axis.
If I tilt the watch in the positive direction (assuming a right-handed coordinte system), i.e.:
if I tilt my wrist away from me, the object moves to the top of the screen;
but, if I tilt my wrist to the right, the object moves to the left of the screen.