[Storyboard/General]*It's extremely easy to use a bg image for the song selection screen without it showing up in the SB. First, insert the background into each difficulty like you normally would. Then, insert the following line into the Background layer of your .osb:
Sprite,Background,Centre,"Background.png",320,240
F,0,0,,0
And that's it!
*The blocks on the right side are not aligned:
http://puu.sh/Ji0*02:54:560 - I'm a bit concerned about the strobes here. I think that they're strong enough to warrant an epilepsy warning for the map.
*Isn't it strange to have both a storyboarded pass/fail and a default one? You could always skin a blank pass/fail image to stick in the folder (and possibly blank sound files too).
*Offset is noticeably late. Try 1988 instead.
*The text at the bottom of the screen is fine, but I feel that some lines could be moved down a pixel. I'd rather they touch the bottom of the screen than touch the bottom of the storyboard.
*Shouldn't the title be capitalized?
--I didn't want to give you a tiny mod of SB stuff, so I did a full mod on the mapset as well--[Easy]*No spinners? I recommend placing at least one to prevent tied scores.
[Normal]02:19:760 (3,4,5) - (nazi) spacing is off
[Hard]*I'd raise drain a tick.
01:14:000 (3,4) - It's a bit hard to see that 4 is only 1/4th after 3 due to the stacking. Perhaps try spacing them like
http://puu.sh/Jj3 or
http://puu.sh/Jj4 instead? (and then repeat for 01:15:920 (3,4))
[Insane]*Diff settings are a bit low (basically the same as Hard's). Try raising OD/Drain 1 tick each.
*I see lots of spacing issues:
00:23:600 (3,4) - These look like they're only 1/4th apart.
00:34:160 (6,7) - a bit too close together (which makes it look like the stream is continuous)
00:40:040 (6,1) - could be spaced a bit closer to make it less ambiguous whether they're 1/4th apart or not.
00:50:720 (4,5) - a bit too close/ambiguous
00:52:640 (4,5) - ^
01:13:400 (2,3) - too far apart
01:15:320 (2,3) - ^
01:15:800 (4,5) - ^
*a few more in here from the copypasta
01:34:400 (2,3,5) - looks strange and threw my sightreading off
01:36:320 (2,3,4,5) - ^
*etc; stopped here.
This diff could still use a lot of work oh wait just noticed this is in WIP and you said the same thing in the op; WHOOPS. Well, here's some help for you, then. :p