thiiiiis was an experience i will give you that, but not a good one in my opinion? it's a fine enough stage and it is definitely indicative of super mario 3d world's charm but it could definitely have been done a lot better, not least with some sharp edges smoothed out, custom textures, or at least the option to choose whatever character you wish? that one is most confusing, ESPECIALLY because the option to choose character in a Mario map restricts people from playing as...Mario. anyway, my thoughts on each act in order:
main level: it's fine! i don't detest it. it's not the most enjoyable, given that some design traits (like the dash panels in the most absurd locations?) are absolutely horribly implemented, but it's okay overall.
find the toad: why is toad outside of the main map structure??? it took me way longer than i'm willing to admit to find him due to that, i didn't even know those parts of the level were meant to be traversed. not fun.
emerald hunt: it's fine. same problems as the initial act but more bearable given that it's an exploration level. not bad.
ring hunt: also a bearable level, but less so because of how easily you can lose rings. not many thoughts, really.
speedrun acts: both are FAR too strict. i skipped both of these. it also highlights how much of a pain the rotating fire geysers are. why are those even in the level??
enemy rush: another one i skipped, but for what it's worth, it was mildly enjoyable. also appreciate the aesthetical change.
ice: the most enjoyable one, personally. aesthetical change and no radical goal to achieve. awesome.
choose your character: what was the point of this
overall: this is an okay level with FAR too much bloat and too many problems to have been an effective use of my time. not fun, but it has a lot more potential than you're making use of. i'd advise expanding this with more levels rather than copy pasting the same level eight god damn times.