the map uses big note in some places where there is no crash or loud sound, while ignoring others where there is a loud crash, so you should consider removing those that do not highlight anything in particular. this issue applies to all difficulties. you should consider carefully if you want to be consistent by mapping all the loud crashes with big notes, or ignoring them and removing big note (which I recommend more).
00:45:935 / 00:46:580 / 00:48:515 / 00:49:160
not strong enough sound to use a big note here, prefer more calm mapping
01:01:741 / 01:06:902 / 01:12:064
here big note seems unnecessary too, consider removing
KantanとMuzukashiiを少しbuffしたほうがいいと思います。kantanとFutsuu、MuzukashiiとOniではSRにかなり差があり直線的では無いので。SRの調整は他のマップセットとか見て調整していってください