Snippet of the ACESInteractiveParticleWall : https://github.com/acesinc/ACESInteractiveParticleWall

particleWall.js

Leap.loop({
    hand: function (hand) {

        var pos = hand.screenPosition();
        if (pJS) {

            pJS.interactivity.mouse.pos_x = pos[0] + 100;
            pJS.interactivity.mouse.pos_y = pos[1] + 350;

            if (pJS.retina) {
                pJS.interactivity.mouse.pos_x *= pJS.canvas.pxratio;
                pJS.interactivity.mouse.pos_y *= pJS.canvas.pxratio;
            }

            pJS.interactivity.status = 'mousemove';
        }
    }

}).use('screenPosition', {scale: 0.70});