This is very nifty, but I think it would be an even better demo with a couple of tweaks:

• Make it possible to see what policies are being applied.
• Provide a more lax policy set that just incorporates perlstyle.

Perl-Critic itself with default policies looks impressive, and I will be poking at it. But its reconfigurability is even cooler, and I think the demo should show that off in some way.