To activate the input cheat dialog box you must double click the left top corner of the Patlabor logo. Then type: kidokeisatsu to activate the cheat mode.
Finally type one of the following 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).