JJJ!! I'm just here to star, but a few things I saw are:
[Hard] 00:55:05 (7) - new combo 01:06:48 (7) - new combo (due to jumpage) 01:17:91() - might sound good to put a beat here stacked? more exciting finish!
[easy] 00:34:34 (1,2,3) - 1 grid left to align (2) with (4) 00:46:48 (1,4,5,8) - Is there a way to curve (1) and (5) a little more to align (4,8) with their start? 00:57:91 (1,4,5,8) - ^