Pretty easy and fun so far. Except Chillout. Please kill Chillout.
I plan to go for all the gold speed berries and silvers in all of the difficulties. It will probably take a while. Maybe I won't finish it. We'll see :)

0:00 Heavenly Altitudes
1:05 Desolate Spire
2:13 Azurite Ascent
3:19 Seeker Temple
4:17 Crystal Enigma
5:51 Space Jam Fever Dream
6:42 Electric Stratosphere
8:13 Blast Processing
9:24 The Singularity
10:00 Badeline Block Belt
11:07 Temple of the Kevins
12:26 Thoughtful Dreams
13:07 Mossy Caverns
15:47 Starjump
16:45 Heaven's Outer Space
18:50 Cirque Maderano
20:28 Into the Storm
21:15 Chillout Mountain

22:51 Beginner Heartside
26:18 Rainbow Collect + Journal