One thing you can do to earn a few style points but mainly to maximize your use of Getopt::Long is to use a hash. For one thing, it allows you to pass a simple hashref so that you don't end up doing any ugly $main::opt_foo business when you're trying to access your options from another class. And it also makes it easy to have default options.

my %opts = ( 'foo' => 'default_value',
             'bar' => 'another_default_value',
             'baz' => 'yet_another' ); 

GetOptions( \%opts, override, default, values, here);

My::Class->method( \%opts );

# ... elsewhere in your code ...

package My::Class;

  my $class    = shift;
  my $opts_ref = shift;

  ...
[download]

Also, if you're going to use an anonymous sub for help, it reads a little better if you do:

   'h|help'   => sub { help() },
[download]

then have sub help print out your help text.

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