#!/usr/bin/perl -sl
[download]

The -s switch is used to parse command line switches but your program doesn't use command line switches.

The -l switch is used to set the Output Record Separator to the same value as the Input Record Separator but later you are explicitly changing the Output Record Separator.

BEGIN { $^W = 1; }
sub BEGIN {
    if ($^W == 1) {
        print "Let's get started...\n";
    }
    else {
        die $@;
    }    
}
[download]

Why is this code here?    You turn global warnings on in a BEGIN block.    Why not just use the -w or -W switch?    And why use lexical warnings later as well?    And why die if warnings aren't enabled when you just turned them on?

local $OUTPUT_RECORD_SEPARATOR = *\ ;
[download]

Why are you assigning the value '*main::\' to $\?