Everything in spoilers for those who don't have the game (not including the ones released in Japan, obviously).
Mostly rants opinions ahead. Not gonna describe the game too much.
Spoiler:
OK, I have to admit, when I heard about the change, I was thinking that the new game would be a lot like the flipping card thing from the original GSC. And so I was wrong.
I spent at least an HOUR playing the thing. Knowing how combinations and permutations work (or at least knowing what they are, I suppose) come in handy. I believe deduction may play a part as well.
I like how it does import such a thing in, and I like how it's free (though you really won't get coins too often unless you're able to flip over all the x2 and x3 cards per level), but I really do like the slots with Smeargle and all more.
Maybe it's just because I grew up with slots being in every normal Pokemon game, is all.
Edit: Oh, and while the game may be free, it seems like you can't buy your own coins, which kind of sucks.