Changing a single character (the '/' three lines up from PERL) to '"' (double-quote) makes it look much better on light-background terminals. Changing two characters makes it look the same regardless of the terminal's background:
I haven't de-obfuscated it yet (or even de-parsed it), but it's result is attractive enough to be appreciated as is. To me the cool thing was seeing "JUST ANOTHER PERL HACKER" in plaintext in the code, but then being pleasantly surprised by the output.
FYI I ran it in Windows (with no ANSI support) and it was garbled. I ran it in cygwin and - gorgeous!