Category only show the first page

can you post the php code of your page?

@bkdimri: This is the php code of category.php:

<?php
	remove_action( 'genesis_loop', 'genesis_do_loop' );
	add_action( 'genesis_loop', 'gamecat' );

function gamecat(){
?>
	<div class="main-home">
		<div class="title green no-border">
		<h1 class="title-h"><?php single_cat_title(); ?></h1>
		</div>
		<div class="breadcrumb-wrap">
		<?php if (function_exists('breadcrumbs')) breadcrumbs(); ?>
		</div>
		<div class="list-game">
		<div class="block1">
				<?php
				$game = new WP_Query('showposts=1');
				if ( have_posts() ) :
				while($game->have_posts()):$game->the_post();
							$thumbnail = genesis_get_image(
								array(
									'size' => 'img-home',
									'attr' => array(
										'alt' => caia_get_image_attr( 'alt' ),
										'title' => caia_get_image_attr( 'title' ),
										'class' => 'center'
									)
								)
							);
							?>

				<div class="list-post-left-1">
					<?php
					    printf( '<a href="%s" title="%s">%s</a>', get_permalink(), get_the_title(), $thumbnail );
					?>
					<div class="list-post-1-intro">
					<?php
						printf( '<a href="%s" title="%s"><h3>%s</h3></a>', get_permalink(), get_the_title(), get_the_title() );
					?>
					<div class="div-kk">
					<?php if(function_exists("kk_star_ratings")) : echo kk_star_ratings(get_the_ID()); endif; ?>
					</div>
					</div>
				</div>
				<div class="list-post-right-1">
					<?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('ads2') ) : endif; ?>
				</div>

			<?php endwhile; wp_reset_postdata();?>
			<?php endif; ?>
		</div><!--end block1-->
		<div class="block2">
				<?php
							$category = get_category( get_query_var( 'cat' ) );
							$cat_id = $category->cat_ID;
							$game2 = new WP_Query(array(
							'offset' => 1,
							'cat'  => $cat_id ,
							));
				if (have_posts() ):
				while($game2->have_posts()):$game2->the_post();
							$thumbnail = genesis_get_image(
								array(
									'size' => 'img-home',
									'attr' => array(
										'alt' => caia_get_image_attr( 'alt' ),
										'title' => caia_get_image_attr( 'title' ),
										'class' => 'center'
									)
								)
							);
				?>
				<div class="list-post-left">

					<?php
					    printf( '<a href="%s" title="%s">%s</a>', get_permalink(), get_the_title(), $thumbnail );
					?>

					<div class="list-post-intro">
					<?php
						printf( '<a href="%s" title="%s"><h3>%s</h3></a>', get_permalink(), get_the_title(), get_the_title() );
					?>
					<div class="div-kk0">
					<span class="icon-view"><?php echo postview_get(get_the_ID()); ?></span>
					<span class="icon-download"><?php echo postdown_get(get_the_ID()); ?></span>
					</div>
					<div class="div-kk">
					<?php if(function_exists("kk_star_ratings")) : echo kk_star_ratings(get_the_ID()); endif; ?>

					</div>
					<div class="div-icon-os <?php echo types_render_field( "danh-cho-he-dieu-hanh", array( "separator" => " " ) ); ?>">
					<span class="icon-adroid"></span>
					<span class="icon-wp"></span>
					<span class="icon-ios"></span>
					</div>
					</div>
				</div>
				<?php endwhile; wp_reset_postdata();?>
				<?php else : ?>
				<p class="sorry"><?php _e( 'Xin l?i ch?a có bài vi?t trong chuyên m?c' ); ?></p>
				<?php endif; ?>
				<div class="clear"></div>
				<div class="paging">
				<div class="navigation">
					<?php if(function_exists('wp_pagenavi')) { wp_pagenavi(); } else { ?>
					<div class="alignleft"><?php next_posts_link('&laquo; Older Entries') ?></div>
					<div class="alignright"><?php previous_posts_link('Newer Entries &raquo;') ?></div>
					<?php } ?>
				</div>
				</div>
		</div> <!--end block2-->
		</div><!--end list game-->
	</div><!--end mainhome-->
<?php }

instead of

<?php
$game = new WP_Query('showposts=1');
if ( have_posts() ) :while($game->have_posts()):$game->the_post();

try this

<?php
$currentPage = (get_query_var('paged'))? get_query_var('paged') : 1;
$args =array(
         'cat' => 5, //enter your category id here
	'posts_per_page' => 30,
	'nopaging' => false,
	'paged' => $currentPage,
	);

$wp_query = new WP_Query($args);
if ( $wp_query-> have_posts() ) :while($wp_query->have_posts()):$wp_query->the_post();

I will try and let you know some hours later, now is 2:40 A.M in Vietnam.
Thank you very much!

@bkdimri: I tried to do it, but the problem has not been fixed.
Please help me.
Thank you,

Check this video on YouTube. See if it helps solve your issue
<a href=”
https://youtu.be/xEA2zviCakw”&gt; pagination video

My problem has not been fixed.
Anybody help me please. ??