Each level, a new hidden word will appear in the game.
To find out each letter of the word, the player can solve a puzzle, where he has to guess a four-letter word in 6 tries, with the game showing him if he
got certain letters wrong, right, or right but in the wrong place.
If the player thinks he got the main word discovered, he can guess it,
but guessing the main word does not give him hints.
