Honestly, pretty alright. It's a neat execution, but mostly held back by the enemy spam and some difficulty spikes in some areas. Personally, I wish the levels were separate from the main stage, like how the OG Mario 64 does.
Honestly, some of the levels have great concepts and execution. Honestly, some of the lobbies are also pretty fine (enemies aside) though the opportunity of adding checkpoints is kind of missed in my opinion due to the fact nobody wants to start from the top when you die.