Board Thread:Plants vs. Zombies 2: It's About Time/@comment-5792287-20131203091220/@comment-5106079-20131211162053

Yes, some levels have 3 (counting the "Don't lose any lawnmower" objective) others 2 or 1. Talking about replayability, I think it hasn't change. If you ask me, I hate those challenge levels  because they're too many (not all, but some ones are really annoying) and I just completed all the stars and wanted to never see them again XD But that's just my opinion.

Also, before when you completed a three-star level you could never played it again but now you can (although it is not optional now).