Probably the best sequel you'll ever find!
The depth that it goes into is great. All different characters, different eggs, bird handling Kazooie, character split pads (probably most fascinating part), the train stations, the way all the levels intermingle is also great & tbh I could go on forever but I wanna keep it short.
The 1st level keeps it simple & it seems it's gonna be easy but trust it isn't because after that it becomes a slog & there are certain jiggies you can't acquire until you obtain new abilities from the later levels.
It will definitely take longer to complete this 1 & it isn't easy this time to collect absolutely everything. There are similarities from this to Mario 64 & DK 64 but in my opinion it beats them both for the sheer amount of stuff there is to do.
It's a must buy!