When you start the game click on "Option" and be sure to tick "Easy Mode". On that mode there is no timer and you can take your time to complete all stages/levels.

The important thing is to not to have to thick layers of stacks. It is better to pick cards throughout the various piles of cards. If you can make sure, that your columns are of even thickness




Lastly, as you finish the game, please make sure that you can match the pairs of stacks according to the rule. Otherwise, you could get a stack or two that are left out and you cannot select them and you have to start over.

If/when you can't find more pairs you can use the hint button marked with purple and it will show you available pairs.
If you think there are no more pairs press the refresh button marked with black and it will refresh the tiles.




















Tip: What I did was press the hint button and leave at least one pair highlighted like this:
Then continue playing so I know there is at least one more move and my next move won't be my last. When you think there are no more moves you can click the highlighted pair(s) or just click the refresh button and repeat the same process till you complete the stage. ^^