Rocket does not look like a first-generation title. There are no blurry textures. There is no fogging. The game does not stutter. In fact, it's damn near close to Banjo-Kazooie in terms of graphic finesse and that's an achievement in itself.
Rocket sounds like it.
There is no other way to describe the sometimes jazzy, sometimes organy, always distracting music in the game. The sound effects, on the other hand, are executed well enough. They're cute, happy, and very platformer standard. It works fine. Rayman 2 or Rocket.