I've been having a blast playing this every day and talking with a friend about strategies for purposefully trying to lose in hard mode.
"Hard Mode" may make it harder to think of words to guess, but it seems to us that it *mostly* makes it hard to lose since being restricted to previous clue consistency quickly narrows down word possibilities. But it is still possible to lose with some creative use of double letters, etc. One thing to consider when trying to lose is that hard mode says it restricts guesses to be consistent with clues, but it will actually let in some guesses that are inconsistent -- for example when you use a letter twice and you get the location right and then for the second use you get a "not in the word", you shouldnt be able to guess a word with that letter doubled up any more, but the game won't stop you from doing that repeatedly.