Some of of these things are just small suggestions, pick which ones you want to follow~
-The offset seems pretty early at the moment, I would try 420 (don't forget to resnap all notes/timing sections)
-The default x % . etc look odd with the skinned numbers you are using atm in my opinion, I would skin those too
Relax:
For such a long mp3 it would be nicer if more of it was mapped but ok
00:19:400 (1,2) - switch new combo? Seems to follow your pattern more
01:18:400 (1) - decrease volume on this, its a pretty dramatic change from the ones before and after it
Dance:
Turn the normal hitsound sections down, they are too loud compared to the song
00:20:400 (1,2,3,4,5,1,2,3,4,5) - might look neater if spread out more
00:29:400 (3,4,5) - continue your whistle pattern
00:34:400 (1) - kind of an odd shape~ Maybe align ends more?
00:49:400 (4) - add whistle to follow your pattern
00:58:400 (3,1,2) - I wouldn't overlap these
01:03:900 (7) - could look nicer aligned with 5
01:20:900 (1,4) - not a major issue but stack these? (I would make 01:20:900 (1,2,3,4,5,6) more symmetrical in general)
01:47:400 (1) - add whistle (and prob doesn't need new combo)
03:22:400 (3) - add whistle to the start to follow pattern
03:42:900 (4,5,6) - don't overlap?
Go through the entire map and see where you missed off some whistles if possible. It sounds strange when a note doesn't have one when you basically follow the same rhythm 99% of the time
Groove:
Turn the normal hitsound sections down, they are too loud compared to the song
Raise OD slightly for an Insane?
00:44:150 (1) - new combo isn't needed
02:32:400 (1) - add whistle to follow your pattern
03:22:150 (1) - new combo isn't needed
03:58:025 (6) - move to white tick
Maps are pretty nice and very few technical errors. However would suggest you go through and make sure all of your hitsounds are in a consistent pattern and make a few of the patterns slightly neater in general
Have a star~