[General]Disable the letterboxing.
Is there something to put in Source?
To be ranked, your beatmap set needs to have at least one difficulty with <= 3 stars. If you reduce Normal's OD by 1, it should drop it to just under 3. Don't always rely on this as a cheap way to reduce star rating though.
[Normal]04:06:209 - Unnecessary timing point. I think you got the volumes off by 5% compared to the same section for Hard.
00:17:036 (2) - One right.
00:36:209 (5,1) - Having a separate combo here looks strange, even though it fits the music.
00:42:525 (4,1) - ^
01:20:194 (3) - Whistle.
01:20:645 (4) - Remove whistle.
01:21:096 (5) - Whistle.
01:21:547 (1) - Whistle at the end.
01:22:450 (2) - Remove whistle from the start, add whistle at the end.
01:25:157 (2) - Remove whistle from the end.
01:26:510 (3) - Whistle.
01:37:337 (4) - Whistle.
02:45:006 (6) - One right.
02:48:615 (1,2,3,1) - You might be able to shuffle this around a bit so that the (3) lines up with the slider nicely.
03:03:051 (1) - Whistle.
03:42:299 (2) - Remove whistle from end, add whistle to repeat.
03:43:653 (3) - Whistle.
03:49:517 (5) - Whistle.
03:59:217 (3) - Remove whistle from end.
04:00:119 (4) - Add whistle or finish.
[Hard]00:37:111 (2,3) - One right, for symmetry with (7).
00:56:961 (6) - Whistle at the end.
01:22:450 (6) - One left, for symmetry with the next slider (1).
01:42:074 (2) - Remove whistle from end.
01:42:976 (3) - Whistle.
01:46:811 (5) - Delete.
02:26:510 (3) - Finish at the start might be unnecessary.
02:31:021 (1) - Whistle.
02:35:532 (1) - This looks icky starting a combo here.
02:37:337 (1) - ^
03:00:796 (3) - Whistle at the end.
03:01:472 (4) - Remove whistle from the start, add whistle to the end.
03:02:149 (5) - Delete.
03:02:375 (6) - Remove whistle, add finish.
03:18:841 (3) - Whistle?
03:39:593 (2) - One right, for symmetry with the next slider (1).
03:56:735 (1,2,3,4) - You might be able to make this quadrilateral look a little more regular. At the moment it looks kinda squished at the top.
04:03:728 (4,1,4) - I can see you've disabled grid to place the first (4) here, then flipped it to make (1). You need to also make the second (4) line up. Copy (1) and flip it again.
Great song, and really solid maps. Get it ranked!