Just a suggestion, and personally it's the only thing that REALLY bothers me.
The focus challenge and how unfair it can be.
You have 10 seconds which is understandable, but I personally would think it would be better if the timer would pause when it's loading the new tiles considering my computer will lag and I lose time by waiting for the tiles and can only get 2 matches.
Also, been noticing a trend that the higher level you become, the more cards that come up. And you still have the same time limit. It makes it difficult to get a medium coffee especially because again, the timer keeps going as you're waiting for the cards to load.
I guess basically all I'm asking is if you're not going to pause the timer, then just keep it at 6 cards with 2 matches. Would make things less frustrating.