Most are suggestions. You don't have to follow them if you don't want to.
General:
Folder seems okay.
Please make sure all inherited and uninherited timing sections are at the same spot in every map.
New Moon:
01:38:223 (1) - Extend spinner to here. Spinner too short.
02:28:168 - Timing section off. Move it to 02:28:333
Crescent Moon:
00:28:339 (1) - I don't recommend changing slider velocity unless it fits the song. Delete the inherited section and make repeat slider instead? I think it really fits into the music.
00:39:877 (1) - Same. Slow slider doesn't seem to fit. Find another way.
00:45:152 (5) - Slider looks weird. I guess you can try to remake slider so it doesn't look like it's leaning on one side too much
01:53:717 (1,2) - Not properly spaced. This one is way to close compared to other 1/1 beats.
02:15:145 (6) - One grid up?
Half Moon:
+1 OD +1 AR
00:04:346 (1) - Still don't think changing velocity is a good choice here yet.
00:05:946 (2) - Uhh. Maybe you should try making more than one point if you want to make an arc.
00:32:295 (1,2) - ^ :3
01:07:561 - Add note here?
01:08:880 - ^
02:01:291 (5) - Turn on level grid 4 and then move one grid down one grid right.
Jap-Keiji:
Lol BG
AR wayyyy too high for a slow(ish) song. -1AR.
I think you should put soft hitsounds in the beginning until the first break.
01:13:495 Remove break. No point if it's really really short.
Full Moon:
-1 AR also
02:23:054 (1,2,1,2,1,2,1,2) - I think this jump is way harder than Keiji's own. Can you reduce is a bit more? (Maybe same distance as Keiji's?)
Star. Good luck.