There doesn't seem to be any cheat codes for this game. There are however scattered around the internet plenty of scams involving calling telephone numbers to receive 'Free Credits', watch out for people telling you about this as you could find yourself with a huge telephone bill... And no Habbo Credits.
Please only use official numbers as provided by Habbo, on the Habbo website.
And here is a little tip...
To Quickly Move Furniture:
Hold 'Alt' and click on a piece of furniture to move it quickly.
Added by: Sanzano Jun 2nd 2006, ID#8664