There may be a better module, but Term::Prompt has an option for building a menu. It handles parsing input, making sure the user input a valid menu choice, taking multiple selections, etc. etc. Maybe something like this (pretty much taken straight from the module's documentation):

use warnings;
use strict;
use Term::Prompt;

my %option = (
    1 => sub { system('~/script1.pl') },
    2 => sub { system('~/script2.pl') },
    3 => sub { system('~/script3.pl') },
    4 => sub { exit                   },
);

my $result;
while(1) {
    $result = prompt("m", {
        prompt           => 'Pick an option',
        title            => 'Menu',
        items            => [ qw (Option1 Option2 Option3 Exit) ],
        order            => 'down',
        rows             => 4,
        cols             => 1,
        display_base     => 1,
        return_base      => 1,
        accept_multiple_selections => 0,
        accept_empty_selection     => 0,
        ignore_whitespace => 0,
        separator         => '[,/\s]+'
        },
    '1-3, 4 to exit', '1');

    $option{$result}->();
}
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