Come on, a game for kids doesn't have to have basic gameplay and be repetitive. That's what mobile games are for. Even those aren't like this always. Don't educate your kid to like games that are not well designed.
What's with this "it got bad scores because it is a game for kids/it is a platformer"? Disney Infinity is at 71-75, Rayman Legends is above 90, Lego Marvel is at 83-84, Skylanders Swap Force has scores of 82-92, even a game like Lego City Undercover that got some bad reviews from likes of Edge is at 80 score. This has now a metacritic of 59. This is no longer in the controversial or divisive category. If this game wouldn't have been one of the few retail exclusive games for PS4 it would have gone unnoticed and with even lower scores.
IGN gave it a 59. IGN, the gaming site that doesn't want to hurt anybody.
This doesn't mean that it will be a bad game for everyone, every game (even the worst ones) have its fans, because people have different things that click with them in a game. But you should understand that there are a lot of reviewers that didn't enjoy it. And if you read the reviews you see why. These are not invented reasons just because it is a game for kids. This is a full priced retail game, not a $20 download.
Golden Axe was the shit! Don't even mention it in comparison to Knack.