Perl SDL -> New Game!

#!/usr/bin/perl

use strict;
use warnings;

use SDL;
use SDL::Events;
use SDLx::App;
use SDLx::Rect;
use SDLx::Text;
# create the main screen
my $app = SDLx::App->new(
    width    =>500,
    height    =>500,
    title        => 'New Game!',
    dt        => 0.02,
    exit_on_quit => 1,
);

my $player = {
    x             =>  $app->w/2,
    y             => $app->h-20,
    w         => 80,
    h             => 20,
    vel       => 250,
    y_vel     => 0,
};
my $minge = {
    x    => $app->w/2,
    y    => $app->h/2,
    dim    => 10,
};

$app->add_show_handler( \&show);
$app->run;

sub show {
    # first, clear the screen
    $app->draw_rect( [0, 0, $app->width, $app->height], 0x000000FF);
    $app->draw_rect([$player->{x}, $player->{y}, $player->{w}, $player->{h}], 0xFF0000FF);
    $app->draw_circle_filled([$minge->{x}, $minge->{y}], $minge->{dim}, [0, 0,255, 255]);
    $app->update();
}
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