00:00:639 (1) & 00:03:219 (1)
These reverses don't follow anything. Extend the slider to the blue tick and remove the following circles, so that the reverse lands on the keyboard sounds.
00:05:800 (1) - This reverse also doesn't follow anything and ignores the instrumental. Could be mapped like https://imgur.com/a/7U1FW4N to follow the piano.
Changed it, the 00:05:800 (1) - i didn't put on the blue tick, it made the rhythm feel weird and out of place, so i put it on the white tick instead
00:40:961 (1,1,1) - NCing every note is too complex for an Easy and will confuse newer players. Remove NCs to simplify the combo.
01:00:639 (1,2,1) - This flow is very sharp and non-linear, unfitting for an Easy diff and will throw off newer players. Move objects for more linear flow like https://imgur.com/a/WMe0lnc.