First, try and solve the puzzle by figuring out the 6-letter password. All of the letters in the password are on the keypad. The sign is your clue. Type the answer in to complete the puzzle. When you type the answer in, you have to type one letter after another. Immediately after the ding sound plays, type the next letter.
So, this is my first non-platformer game, it took me a while, so I hope you like it. I'm disabling comments because I don't want people giving out the answers. Good Luck!!!