Glaber,
Fun map! Amazing use of slopes, like the last map :). The part where you roll down and up around a bend and down onto some speed boosters that sends the player up into a breakable wall is an absolute blast! The music choice was great and added a lot of atmosphere to the level, and you have a good amount of paths for the player to explore.
I do have a few suggestions:
-I feel like there is somewhat of an over-reliance on springs when some regular level geometry could have done. For the most part, I wouldn't blame you if you choose not to change this, except for one area: the first yellow spring has no reason to be there when some platforms could have done the job. That one especially doesn't make sense, because it's placed right up near the platform it launches you up to, and robs that path of any flow up to that point.
-All the rings along this path (aside from the diagonal ones) aren't floating! Also, the underwater section in this path is much too dark, or the colormap is much too opaque. I could hardly see a thing when I went down there and my laptop is at full brightness!
That's one of my favorite areas, btw. I love vertical platforming in cylinder-shaped areas, mostly because I know they're annoying to pull off in SRB2 :P
Otherwise solid map! The speed boosts were a fantastic addition and you use them in a satisfying way. The visuals were okay, definitely a step above the average user-made map, though I don't like the main wall texture and think that the SRB2Xmas GFZ replacement would've looked better, along with some more texture variety in general, but that's just preference! Also I don't know if there were any emblems. I played the map 4 times, exploring quite a bit as I went, but I only found emerald tokens and not emblems. Maybe I'm not good at exploring!
Anyway, good job!
PS: You misspelled "sapphire" in the wad file.
EDIT: Also how in the heck do you take screenshots without the HUD?