Hello World fails

[rdebath]

I think this program should print "Hello World!" but your interpreter is not interpreting loops as while loops.

aaag gagu gaga gagu gugu uuug gagu guga gaga aaag gagu gaga aaag aaag
aaag gaga gagu aaag aaag aaag aaag aaag aaag aaag aaag aaag aaag aaag
gaga guga gagu gaga guga uuug gagu gugu guga gaga uuug guga guga aaag
aaag aaag aaag aaag aaag aaag aaag aaag aaag gugu guga gaga gaga gaga
gaga gaga gaga uuug uuug uuug uuug guuu gugu gugu aaag aaag aaag guuu
gugu uuug guuu guuu aaag aaag aaag guuu gugu uuug guuu gaga gaga gaga
guuu gugu gugu guuu aaag aaag aaag guuu uuug uuug uuug uuug uuug uuug
guuu gaga uuug guuu gugu gugu aaag guuu gugu guuu

This is a direct translation "interpreter".

#!/usr/bin/ruby
eval 'm=Hash.new(p=0);'+ARGF.read.downcase.gsub(
        /[a-z][a-z0-9]*|./,
        'gaga' => 'p+=1;',
        'gugu' => 'p-=1;',
        'aaag' => 'm[p]+=1;',
        'uuug' => 'm[p]-=1;',
        'unga' => 'm[p]=0;',
        'guuu' => 'putc m[p];',
        'gaaa' => 'm[p]=STDIN.getbyte if !STDIN.eof;',
        'gagu' => '(',
        'guga' => ')while((m[p]&=255)!=0);')