Once you insert the Game Pak of The Game Factory's Neko Entertainment-developed 2007 platform game Postman Pat and the Greendale Rocket into your Game Boy Advance and turned it on, the following health and safety warning will be displayed on the screen of the console until you push a button:
The Entertainment Rights license screen shall then appear, followed by The Game Factory and Neko Entertainment's logos, and finally the start screen; once you have pressed , the text "SELECT LANGUAGE" will be displayed at the top of the screen with the flags of the United Kingdom (English), Norway (Norwegian) and Denmark (Danish) below it. Push the D-Pad up and down to move the "PAT 1" cursor, then press to confirm your choice - however, this guide is only going to cover the English text. The game shall now proceed to the start screen shown above; again, push the D-Pad up and down to move the "PAT 1" cursor, then press to confirm your choice. If you select "STORY", the game will start from the beginning, but if you select "PASSWORD", you will have to enter a four-symbol code to start from one of the later levels - and if you select "OPTIONS", you will have the options of selecting a different language, toggling the music (a series of original compositions, based on the show's theme song) on or off, and viewing the credits.