Right now, if I use a non existant file I get a lot of irrelevant (for the user) data:

Yes, quite so. My script wasn't intended to be used at the command-line, but to be associated with the ZIP filetype in Windows Explorer, for double-click unzipping. A real command-line zipfile utility would need some additional functionality.

$;=sub{$/};@;=map{my($a,$b)=($_,$;);$;=sub{$a.$b->()}}
split//,".rekcah lreP rehtona tsuJ";$\=$ ;->();print$/
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