Compared to LEGO Marvel Super Heroes, this game feels like a gigantic step backwards. First off, this game feels like a poor movie to video game adaptation compared to the previous LEGO games like LEGO Indiana Jones or Lord of the Rings. I think the issue is that the game shackles itself to the movie and tries to follow it too closely, which breaks the whole theme of the movie which is about being creative with LEGOs. I think the game would have been much better off if it had been a prequel or parallel story of some sort that could better utilize the potential presented by the world of the LEGO movie.
This unsatisfying story is exacerbated by the rather pitiful overworld that is miniscule in comparison to other recent LEGO games like Lord of the Rings or Marvel Super Heroes. Bricksburg is all of two city blocks, the wild west is the town square, and cloud cuckoo land is two or three (small) clouds. There's a few side quests to do in these hubs, but they pale in comparison to the previously mentioned LEGO games and make this game about half as long in comparison.
To add insult to injury, the game has a surprisingly decent selection of vehicles that can be built from the treasures found in the missions but they can only be used in the bonus room (i.e. a kid's bedroom) which is basically sterile and devoid of interesting things to smash. A huge letdown from the bonus areas of the previous LEGO games.
This is all on top of the standard LEGO game bugs which required me to restart some of the missions partway through because a script wouldn't work and I would be stuck. The character creator is also fairly pitiful.
The one highlight of this game is that it adds giant mechs that can be used in some of the missions. Those would have been fun if Bricksburg had been a proper city and if the game allowed vehicles to be spawn in the hubs.
Overall I was disappointed by this LEGO game and wouldn't recommend it unless you're trying to collect all the LEGO games. Even if you liked the LEGO movie, I would say go play some of the older LEGO action games or find an old LEGO creator game instead.