hs are fine however the unsnapped circles (see ai mod) should be fixed as it didnt copy the hs to the main diff for these
2020128#4844831 probably applies to your map aswell as the audio used on said map was encoded with the same bitrate as the one used here
source should be "東方花映塚 ～ Phantasmagoria of Flower View." as this song is a remix of a song from said game
some more tags to add: "c-clays" "cclays" "ground" "zero" "toho" "2007" as this track was also released on the album: "GROUND ZERO ～TOHO ROCK!! 2007" by C-CLAYS
also some more misc ones: "vg" "video" "game" "music"
"metal" should also be added as genre and language should be added to tags
the three hitsound files with brackets in their name should be deleted as they get uploaded as well and serve no further purpose, namely soft-hitfinish10(bom), *11(bum), *12(bim)
since you seemingly used GoldenWolf's hitsound they should be credited with their username in the tags
according to osu ranked criteria autoplay should be able to complete every spinner with atleast 1000 points which it isnt able to for this one 05:03:346 (1) - I would propose either making 05:02:362 (1) - end on where 05:03:346 (1) - does or simply merging the thre spinners 05:00:764 (1,1,1) - into a single one
04:04:698 (1,1) - there are 2 objects stacked on top of another, would consider removing the spinner
bg quality seems to be a bit low consider using this instead https://cdn.donmai.us/original/10/68/__houraisan_kaguya_touhou_drawn_by_sesmkun__10684b85fbc7bc588c9e6379fe14751c.jpg
meanwhile the name of the game should be removed from tags as its already searchable due to the source