With regards to Islands of War (outdated), in order to gain access to cheats (to my knowledge what the cheats are), put "Beta Tester" as your username. Word for word and letter for letter. It took me a while to go through my old source code to find what the codes were.
I am also aware that the game is left unfinished. It kind of died as time progressed and I lost interest in it.
Now with respect to IIslands of War, you can find hints to the secret code in the previous devlog. Its hidden in a gif and it will be pretty obvious what you need to do once you see the word hidden in the clouds. It does NOT add any game content and simply unlocks my developer tools for further debugging (there's not much more that you need once you have the sandbox mode).
Hope this clarifies things up.