Kolakoski

Score: 64.25 (pass)

#!perl -l
print map{push@_,($n=$ARGV[$i%2])x($c=$_[$i++]||$n);$c}1..pop

Score: 65.25 (pass)

#!perl -l
print map{push@_,($n=$ARGV[$i%2])x($_[$i]||$n);$_[$i++]}1..pop

Score: 68.24 (fail)

#!perl -l
print map{push@_bin,($n=$ARGV[$i%2])x($_[$i]||$n);$_[$i++]}1..pop