I would find it very useful if there was a clock feature implemented for the puzzles. I like to solve puzzles, and I would like to learn to solve them in a reasonable time so it has a better relation to my real games. I play 30 min games frequently, so for example I would set my puzzle clock to 25-30 seconds. For 10 min players, it would maybe meaningful to set the clock to 10 seconds.
Thank you for consideration!