I recently played this episode for a while and I stopped after beating 4th level. This episode focuses on Super Mario 64 ideas, but fails to be it. Each level from one world has the same level design and placement in one section but with different changes, which appear in each level. The design is really flat and boring and it
lacks background objects as the ones for decoration. I don't know French language very well, so use English in your episodes.
Looking to other episodes, I think this is considered to be your worst work so far. I think you need to stop rushing on your episodes too much, because they aren't good at all. I suggest playing levels in The Best section or play episodes that have great quality of level design, like
Airship Atack,
Endless Exploration and
Mario Prime.