We know it's a joke but this is a million times better than what's currently in CTGP. There's still room for improvement, of course... having another way across the mushroom section that is _safer_ would be ideal, but this has more than enough changes to get it passable.
I know you meant this as a joke but honestly it has great potential. Would love a Peaks remake with faithful gameplay elements to the original. When I saw what you did to Delfino Island I instantly thought "Peaks needs this treatment". Enjoyed watching the video.
despite this being a joke track, it does the one thing right that I have issues with mushroom mountain, and that is nerfing the mushroom section entirely. Its kind of too iconic, as its really what mushroom peaks is known for. Lets be honest, Peaks doesn't really have much more "highlights" then this, and maybe the beginning... The giant block straightaway is agonizing. For a joke track, this is amazing. You should consider polishing it up a bit, for real, and then submitting it to CTGP.