Hehe, the 3rd one, or the Nothing? one is really cool.
You get out Paint (Don't use any other ones, because I tried with Paint.Net and it didn't work) and press PrtSc on your keyboard while you are playing the game, paste it on the program, and fill in the white with a bucket tool, it might come up with something weird, so click on the weird part, and if you see any other white parts, memorize them, and do ctrl and z, then click on the white parts that you memorized, it should come up with the password, I'm not going to say it as it ruins all the fun. (Sorry if this is confusing)
 "Kuzzle"){kind=icon}
 "Text Adventure Creation Kit"){kind=icon}
 "Avoider Game Tutorial -- Kongregate Edition"){kind=icon}
 "I Can't Find My Glasses"){kind=icon}