00:06:306 (2) - Slider body is possibly offscreen, ensure the entire white border is visible on a 4:3 aspect ratio.
00:15:652 (2) - I'd remove this circle, and maybe make 00:15:558 (1) a 1/2 slider if you really want to keep the secondary sound at 00:15:562.
00:37:521 (1,1) - Spinner recovery time is too short (187 ms, expected 334).
I suggest to delete 00:38:923 (1) and end the spinner 00:37:521 (1) at 00:38:923 instead of 00:38:736.
00:40:792 (3,4,5) - Confusing as these 3 elements are visually in the same distance while not sharing the same gap (3->4 is 0.5 beats while 4->5 is 1.0 beats).
01:06:867 (3) - I'd replace this slider by a simple 1/2 slider without reverse, would be less confusing for the difficulty of your map.
01:22:287 (1,2) - For these two sliders, would remove a reverse then add a circle where they currently end, I think it would play better in this way.
01:59:670 (1) - 02:08:362 (5) - I'd increase the spacing between the elements in this part to avoid unwanted overlaps such as 02:02:661 (1) with 02:03:222 (1), 02:06:212 (1) with 02:06:680 (4) or 02:06:960 (1) with 02:07:427 (4).