Okay, sorry for a late mod.
I can't play super Insane maps, nor can I mod them that well so I can't judge whether or not they're actually playable (I'm sure you and your collaborator are able to FC it) so I won't be able to mod it as thoroughly. Sorry! I mod cosmetics more often anyway.
General
Punch me in the dick for saying this, but you should have an easier difficulty whether or not it's for approval. It's more fair to the new players, regardless that it's approval, because they wouldn't be able to play their favorite songs just because there isn't a difficulty easy enough for them. Approval will cycle out anyway with the addition of Performance Points.
I don't really like the preview point. Preview points are interesting given that, say, you could random on this map and you would hear "I LIKE MY WEAPONS HOW I LIKE MY MUSIC..." which is something you would hear every time I click the map. I think it would work well at 00:46:836 (yes, generic chorus preview point, but it's easily the best place to put a preview point because the chorus is what everyone remembers in a song)
Combo Colors
Combo color 2 could be brighter.
I recommend using this as a combo color (lightning)
Storyboard and Skin Elements
AIBat tells me:
Missing SB Elements: morde huehuehue 2.png
SB Elements Not .png: black.jpg
Unused Image Files: pause-overlay.jpg
I recommend having custom pause buttons if you have a pause-overlay, they add to it. I recommend you use the font you use in the lyrics.
Reduce the SB Load at 01:21:614 to 01:22:503 by having it your background fade to Black and White.png, then removing it for the SB at that moment. Afterwards, fade to black (no background). Your SB Load should be reduced to (estimated) 3x during the black and white fade, and then 0.5x.
You do not need a black.jpg file as no background itself is black. When there is no background, osu! generates a black background that costs almost nothing in SB Load. You can have something fade into black while having no SB Load whatsoever by having no background. Remove the background at a certain point where it is not needed (such as when it fades to Black and White.png
During the time periods where there is no black and white, you do not need it in the storyboard. Only have it in the storyboard where it is visible. This is the same for the map background. You have it at an unnecessary 100% fade during the entire time when the map background is present, which wastes SB Load.
Use .jpg compression if you want to reduce load time in-game and download time. .jpg compression is completely unnoticeable in non-solid colored images such as your map background, but it reduces a lot of the file size.
For comparison, this is your original Color.png at 580KB and this the same thing compressed into a .jpg at 89KB. It may not seem like much, but you could probably chop off a few whole MB by doing so...but you don't need to.
Flash with White.png at 01:22:503.
The white flashing between 00:41:614 and 00:43:169 could pulse with Color.png instead to be less of an annoying, repetitive effect.
Place Kei.png in front of Black and White.png in layer order so Black and White doesn't flash in front of Kei.png between 02:26:503 and 02:33:614 (thus making Kei.png repeatedly disappear.) Have it fade when the storyboard fades to black.
Snep's HUE
01:50:392 - New combo?
02:34:947 (3,4,1) - This overlap is too extreme between several notes and sliders. Really, you should avoid overlapping everything...
00:28:280 (1,2,3) - Is there any reason for this extreme jump? Each is separated 3.04x the distance snap, at about 223 milliseconds to reach the next note. That's a little extreme for something that's not really deserving of such an extreme jump...
Kei&Snap's HUE HUE HUE
No problems that I can see.
Very cool map, and very well designed. Fun to watch. Do think of the players who are not able to play high difficulty maps, however.
I can't play super Insane maps, nor can I mod them that well so I can't judge whether or not they're actually playable (I'm sure you and your collaborator are able to FC it) so I won't be able to mod it as thoroughly. Sorry! I mod cosmetics more often anyway.
General
Punch me in the dick for saying this, but you should have an easier difficulty whether or not it's for approval. It's more fair to the new players, regardless that it's approval, because they wouldn't be able to play their favorite songs just because there isn't a difficulty easy enough for them. Approval will cycle out anyway with the addition of Performance Points.
I don't really like the preview point. Preview points are interesting given that, say, you could random on this map and you would hear "I LIKE MY WEAPONS HOW I LIKE MY MUSIC..." which is something you would hear every time I click the map. I think it would work well at 00:46:836 (yes, generic chorus preview point, but it's easily the best place to put a preview point because the chorus is what everyone remembers in a song)
Combo Colors
Combo color 2 could be brighter.
I recommend using this as a combo color (lightning)
Storyboard and Skin Elements
AIBat tells me:
Missing SB Elements: morde huehuehue 2.png
I recommend having custom pause buttons if you have a pause-overlay, they add to it. I recommend you use the font you use in the lyrics.
Reduce the SB Load at 01:21:614 to 01:22:503 by having it your background fade to Black and White.png, then removing it for the SB at that moment. Afterwards, fade to black (no background). Your SB Load should be reduced to (estimated) 3x during the black and white fade, and then 0.5x.
You do not need a black.jpg file as no background itself is black. When there is no background, osu! generates a black background that costs almost nothing in SB Load. You can have something fade into black while having no SB Load whatsoever by having no background. Remove the background at a certain point where it is not needed (such as when it fades to Black and White.png
During the time periods where there is no black and white, you do not need it in the storyboard. Only have it in the storyboard where it is visible. This is the same for the map background. You have it at an unnecessary 100% fade during the entire time when the map background is present, which wastes SB Load.
Use .jpg compression if you want to reduce load time in-game and download time. .jpg compression is completely unnoticeable in non-solid colored images such as your map background, but it reduces a lot of the file size.
For comparison, this is your original Color.png at 580KB and this the same thing compressed into a .jpg at 89KB. It may not seem like much, but you could probably chop off a few whole MB by doing so...but you don't need to.
Flash with White.png at 01:22:503.
The white flashing between 00:41:614 and 00:43:169 could pulse with Color.png instead to be less of an annoying, repetitive effect.
Place Kei.png in front of Black and White.png in layer order so Black and White doesn't flash in front of Kei.png between 02:26:503 and 02:33:614 (thus making Kei.png repeatedly disappear.) Have it fade when the storyboard fades to black.
Snep's HUE
01:50:392 - New combo?
02:34:947 (3,4,1) - This overlap is too extreme between several notes and sliders. Really, you should avoid overlapping everything...
00:28:280 (1,2,3) - Is there any reason for this extreme jump? Each is separated 3.04x the distance snap, at about 223 milliseconds to reach the next note. That's a little extreme for something that's not really deserving of such an extreme jump...
Kei&Snap's HUE HUE HUE
No problems that I can see.
Very cool map, and very well designed. Fun to watch. Do think of the players who are not able to play high difficulty maps, however.