lightening tiles challenge

I'm new to this game so I have a very basic question. What causes the numbered 'lightening tiles' to pop? Is it the timer or the number of moves or something else entirely? I see the moves count down at the top of the screen but they don't always reach zero before "poof" time's up and the lightening tiles explode. What am I not understanding about how the game is played?


Discussion Info

Last updated July 3, 2018 Views 7 Applies to:

If it happens while you still have time left or moves, then it means you ran out of matches.