Get top posts based on like_amount meta field

wp-ulike-pro.php

<?php

function wp_ulike_pro_custom_top_posts($atts){
	$args = array(
		'post_type'  => 'post',
		'orderby'    => array( 'meta_value_num' => 'DESC') ,
		'meta_query' => array(
			'relation' => 'OR',
			array(
				'key'     => 'like_amount',
				'compare' => '>=',
				'value'   => 1,
				'type'    => 'NUMERIC'
			),
			array(
				'key'     => 'like_amount',
				'compare' => 'NOT EXISTS'
			)
		)
	);

	// The Query
	$the_query = new WP_Query( $args );

	ob_start();
	// The Loop
	if ( $the_query->have_posts() ) {
		echo '<ul>';
		while ( $the_query->have_posts() ) {
			$the_query->the_post();
			echo '<li>' . get_the_title() . sprintf( ' (%d)', do_shortcode( '[wp_ulike_counter]' ) ) . '</li>';
		}
		echo '</ul>';
	} else {
		// no posts found
	}
	/* Restore original Post Data */
	wp_reset_postdata();

	return ob_get_clean();
}
add_shortcode( 'wp_ulike_pro_custom_top_posts', 'wp_ulike_pro_custom_top_posts' );