There are not enough chances now. It makes it NO fun. I understand having hard puzzles, but damn.
That's what makes it fun to people who like hard puzzles! Most of the puzzles are fairly easy anyway, and u should be able to get 3 stars first time. It would be good to see the average time before you do a puzzle, as it gives you an idea of how hard it is.
Having more room for error in solving larger puzzles makes perfect sense.