I just read online that in hard mode, there are no cursed objects to find. Here is the quote:
The Hard Mode game follows the exact same storyline as the Basic Mode game.
However, you will no longer have the option of using hints; where your hint
button was located in the first game, there is now a padlock with the words
"Hard Mode" written on it. You also no longer have the option of skipping
puzzles. Hard Mode also has no cursed objects to find, which makes sense
since they serve no purpose without the hint button. (This is a change from
the first game, when cursed objects could still be found on hard mode.)