To activate input cheat dialog box double click the left top 
corner of the patlabor logo type: kidokeisatsu to activate 
cheat mode then you can type these codes :

iwannafollowizumi  - view steps for solving the puzzle
morelaborsparepart - get 1000 points (this will only 
                     work 3 times and you must playing at  
                     level 8 or 9 with score under 20000)