I would not have my streak of 42 if I gave myself a time limit, or if I played in "hard mode".
In the "rabbit hole" puzzle (like "_ _ o n e"), I'm thinking there's still room for skill. First, skill in thinking up words that fit (alone, atone, clone, drone, ozone, phone, prone, scone, shone, stone), then taking those letters (c, h, l, p, r, s, t, z) and making up words that use those (clasp, heart). Ok, so I didn't get the z, but you get the idea. I think "easy" and "hard" modes are not named appropriately, since this exercise, not applicable for hard mode, isn't easy!