Modding by request.
~General~Remove the BG image from your storyboard and set it as the background, so that it appears in your map preview.
Consider renaming the difficulties to be more reflective of actual difficulty. Eg. Normal + Hard. There's really no point being creative in difficulty names if they don't relate to the song at all and/or don't reflect difficulty.
~Normal~Consider AR5 instead of AR4, how you have it now makes it hard to read the overlapping objects, even for a normal diff.
You should change to 1/4 beat snap, it allows you to do a lot more.
You need to add Kiai Time to this diff.
00:05:758 (5) - New Combo.
00:06:681 (1) - Remove NC
00:07:604 (3) - NC
00:08:989 (1) - Remove NC
00:11:758 (1) - Remove NC
00:25:142 (1) - Remove NC
00:26:989 (1) - Remove NC
00:29:758 (1) - Reduce slider time to keep rhythm consistent, like this
http://puu.sh/scOc00:33:450 (1) - Same as above here.
http://puu.sh/scOL00:32:296 (3) - I would delete this note for rhythm consistency. I guess it would be okay how it is now but it's up to you.
00:50:989 (2) - Move this half a beat earlier.
00:54:681 - Consider using a pattern more like this
http://puu.sh/scTl00:56:527 (1) - Remove NC, also try something more like this
http://puu.sh/scV000:59:296 (1) - Remove NC
01:01:142 (1) - ^
01:26:066 (1) - ^
01:29:296 (1) - ^
01:29:758 (1) - ^
01:30:219 (1) - ^
01:30:681 (1) - Unrankable, slider goes back over itself. Must fix.
01:33:912 (1) - Remove NC
01:45:450 (1) - ^
02:03:450 (1,2,3,4,5,6,7,8,9,10) - The overlap here is probably too difficult to read for a normal difficulty, might want to spread these out slightly.
02:11:296 (1) - Remove Nc.
02:11:412 - End the map here.
~Challenge Accepted~00:06:909 (1) - Remove NC
00:07:601 (1) - ^
00:10:947 - Consider adding a note here and spacing the next one out between the note and following slider. Like this.
http://puu.sh/sd1z00:13:601 (1) - Remove NC
00:17:524 (1) - ^
00:17:639 - Delete the note here, it doesn't go with the music. Also space out the next note, like this
http://puu.sh/sd3O00:22:024 (1) - Remove NC.
00:50:062 (1) - Unrankable.
00:51:909 (1) - Unrankable.
00:53:293 (1) - Remove NC.
00:58:370 (1) - ^
00:58:601 (1) - ^
01:00:216 (1) - ^
01:03:909 (1) - ^
01:04:370 (1) - ^
01:48:678 - Some of the spinners around this time may be unrankable. Run your beatmap in Auto and make sure it can get at least 1000 points, otherwise unrankable.
01:50:062 (1) - Remove NC.
02:28:370 (1) - ^
02:28:601 (1) - ^
02:33:447 (5) - Add a new combo here and merge it with the following combo.
02:35:062 (1) - Remove NC.
02:37:370 (1) - ^
02:48:216 (1) - This slider looks really weird and unsymmetrical. Make it symmetrical with the slider in the next combo.
03:04:370 (4) - Unrankable slider.
03:09:562 (1) - Remove NC.
03:09:793 (1) - ^
Hope it helped!