Additional function on World

You need to insert this on World.as until Chevy applies that officially

/**
 * Returns the Entity at front which collides with the point.
 * @param   x       X position
 * @param   y       Y position
 * @return The Entity at front which collides with the point, or null if not found.
 */
public function frontCollidePoint(x:Number, y:Number):Entity
{
    var e:Entity,
    i:int = 0,
    l:int = _layerList.length;
    do
    {
        e = _renderFirst[_layerList[i]];
        while (e)
        {
            if(e.collidePoint(e.x, e.y, x, y)) return e;
            e = e._renderNext
        }
        if(i > l) break;
    }
    while(++i);
	    return null;
}