1) Press g button before you stop the game 2) Press start 3) Read the non-sense word on the screen 4)Press the letters to change it and and turn it into the non-sense word letters in that specific order 5) Press the blue arrow 6) It should say the nonsense-word because it is actually a code 7)Press g to turn all letters into A 8)Press d to go to the next page 9)to go to next level press i key
I give credit to Pearl Harbor museums and itʻs code decipher machine which is what this game is all about and the machine that is still there till this day. In one of the Pearl Harbor (Puʻuloa) museums.