Fun little game.
One thing I can suggest is: the background needs a bit more detail. Some of the pink background images look identical, making 8 of them interchangeable. (4 lighter pink,4 darker pink.)
I presume that the girl pictured is supposed to be "talking to her Mom", in which case:
I suggest that she be holding flowers "just picked from the garden" or wildflowers.
Also dress her as though she has just picked them, rather than that she's come from / going to the pool, and Mother's Day is just an afterthought.
3rd thing would be to have some other pictures as options.
Overall: a nice little puzzle.