Much like the previous movie, it carries a strong sense of adventure.
It funny enough on its own to make it a good time. While the idea of the old guys adjusting is funny at first, it does get old after a while. It's a difficult thing to pull off, and it does so successfully. The reason it works is that the audience is somehow able to see Danny DeVito as the Rock, rather than the just Rock acting like an old guy. The main source of humor is people adjusting to being in different bodies and having different abilities, and it is based on the idea of people ending up in the bodies of people drastically contrast with who they are as people.
At the beginning, Danny DeVito is in the Rock's body, Danny Glover in Kevin Hart, Fridge in Jack Black, and Martha returns to Karen Gillan. Only this time, Spencer's grandfather (Danny DeVito) and his business partner (Danny Glover) get sucked in too. Spencer goes back to Jumanji, and the others need to get him back. It covers many of the same beats, but it's still funny because the premise is something that can be used for a whole new set of different jokes and gags.
It's a fun movie, it's cleverly written, and that's about it. Jumanji: The Next Level is pretty much Welcome to the Jungle all over again. After the success of the sleeper hit Jumanji: Welcome to the Jungle, it was only a matter of time before a sequel got made.