Ok, well, i find that most characters in Amelie(as in other Jeunet films) have that caricatural air about them, most of them have at least one repulsive feature, which makes them look slightly grotesque. It is not a bad thing, at least as far as i'm concerned, it's part of Jeunet's style. Jeux d'enfants: more mature? Debatable. Less surreal? Yes, the characters are a lot more realistic and a lot easier to relate to, for that reason. More reasonable? It holds some surreal elements, and the ending will probably seem quite bizarre at the first viewing, but it is more reasonable than Amelie.
Heart wrenching? It's touching at parts but it won't make you cry your eyes out.
Good comedy with love injected? Yes, it's funny, and it's also a love story.
I liked it more than Amelie, but i did like Amelie, so in view of your distaste for it(and that particular style), i can't guarantee that you will like Jeux D'enfants, all i can say is that i think it's worth giving it a shot.