The code for the function game is defined with the argument order [word, player]:

(defn game
  [word player]
...)

This [word player] argument order is used everywhere a function definition for game appears (pages 250, 251, and 257).

Whenever sample REPL code for calling the game function is shown (pages 254-258), the argument order is swapped to [player word]. e.g.:

(game random-player "hello")