I'd recommend checking out Mario Grand Poo World related record runs and the history of those mods. It's crazy how much effort goes into it.
Run from the namesake: https://www.youtube.com/watch?v=vwYt3QxJv34
Run from the namesake: https://www.youtube.com/watch?v=vwYt3QxJv34
Barbarous King, the creator of Grand Poo World 1 + 2 released this video montage of other streamers playing his Grand Poo World 2 for the first time: https://www.youtube.com/watch?v=anhKrWAT0Oc
And yes, watching him create Grand Poo World 3 has been a ton of fun, I love those streams.