Not the best but far from bad Wonder Park is a movie that has a pretty cool premise and potential but doesn't quite reach greatness. One issue is the pacing of the films tone, during the first arc it's back and forth between whimsical, cutesy, funny and then dramatic until we get the park. The humor isn't laugh out loud either but their are some laughs to be had. One of the films strong points are the action sequences like the introduction the park at the very start and when June and the mascots are dodging the oncoming destruction of the park set foot by the zombie sock monkey toys (I can guarantee you this is the only movie to that zombie Sock monkeys).
The characters are typical but likable but the relationship with June and her mom is one of the films strong points they get along real well and they time their on screen together is just so precocious and Junes arc of dealing with uncertainties of weather her mom can return to her is when the film has it's best moments. Though the pacing is better in the middle of the film it still isn't smooth as butter I don't wanna spoil too much but there's a scene in which the mascots believe June betrays them and it's shown as a big deal, but the next day after helping with the one of the rides, she regains all their trust instantly.
I'm pretty sure the films issues have to do with the directing, there was some drama where the director was called out for harassment charges and had to leave production, so the studio had to carry on with either a new person in charge who has not been credited as of yet or they pressed forward with what they had done so far, and it's pretty sad cause this movie could have had it's issues ironed out and given likely would have dodged a lot of the criticism thrown it's way.
The movie isn't a broken mess it's just their was a lot more that could have been done with it, as it stands now it's a fun movie even if it feels unfocused and has some mood-swings with the tone from scene to scene. It's also a pretty short movie too.
I should also note that much like Jimmy Neutron Boy genius and Big Hero 6, Wonder park is getting TV series that will air on Nickelodeon in the not too distant future and hopefully Wonder Park gets more justice done their.