Ordering WP_QUERY results by several meta keys in WordPress

WordPress ordering WP_QUERY results by several meta keys

<?php
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
		
$args = array(						
	'post_type' => 'games',
	'author' => $user_id,
	'meta_query'      => array(
		'relation'    => 'AND',
		'game_date' => array(
			'key'     => 'game_date',
			'compare' => 'EXISTS',
		),
		'game_time'    => array(
			'key'     => 'game_time',
			'compare' => 'EXISTS',
		)
	), 
	'orderby'  => array(
		'game_date' => 'DESC',
		'game_time'      => 'ASC',
	),
	'posts_per_page' => NUMBER_PER_PAGE, 
	'paged' => $paged
);

$listings = new WP_Query( $args );					

if ( $listings->have_posts() )
{
  	while ( $listings->have_posts() ) : $listings->the_post();
	  
	//...
	  
	endwhile;
}
else
{
	 //...
}
?>