I think you're forgetting that the damage() method has to actually alter the object's hit-points: 
sub damage {
  ...
  $self->{_hp} = $self->{_hp} - $hits;
  # or, more succinctly:
  # $self->{_hp} -= $hits;
}

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Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re^2: Perl OO newbie advice - object interaction by japhy
in thread Perl OO newbie advice - object interaction by yoda54

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