Unless I’m mistaken, as things stand there’s no strategy any more optimal than clicking boxes 1 and 2, then 3 and 4, then 5 and 6, etc., remembering what’s under each square and interrupting your pattern to make the match when coming across an icon you’ve previously seen.

So…assuming your strategy is some equivalent of the above (and that you make no mistakes), whether you win or lose is utterly preordained (or completely due to chance, I guess, if you switch to a different random click-order for each level).

Unless the collectibles are more than merely cosmetic? (I didn’t detect any changes when equipping an object from the main menu. Am I missing something?)