Memory

Nice smooth game play. The only issue I ran across, is when you select a card in a row, the card directly behind it becomes harder to click, as you only have the very small right upper side of that card to click, as it gets blocked by the front card. Other than that, good job.

This game is too difficult. I can only remember the card with the girl on it.

Like PeaTear said but on hard it's even worse: The middle card in the front row covers the middle card of the second row completely. Maybe you could make the top bar a bit smaller and have bigger cards instead. Not all of your photos scale well (e.g. what appears to be a photo of a man standing in snowy forest?), some (or most) on the other hand look still good in smaller size (those with a lot of sky or the girl). Maybe choose your photos with this in mind. Or how about displaying an enlarged pop-up if you hover over an open card? But it's quite good already. Needs some more polishing, like neat (and decent/non-obstrusive) card shuffling and flipping sounds. I'd like to see a revamped version.

Same problem with PeaTear. Also you should perhaps add a score counter for players too keep up with. Other than that, pretty nice game.