01:20:713 (2,3,4,1,2,3,4,1,2,3,4,1,2,3,4) - I think splitting this stream into 2 groups of 8 rather than 4 groups of 4 would make it look nicer
00:39:559 (1) - I think that extening this slider to where 00:39:943 (2) - is and starting the stream on 00:40:072 (3) - fits the music and the beat structure of the song better
00:02:251 (6,7,8) - I think this could be a bit more aesthetically appealing if you moved (7) up just a tiny bit to make it a nice curve
00:07:251 (2) - This slider here doesn't really fit a sound in the music, replace this with something else to fit the drumline here
01:26:738 (2) - I think changing this hit sound the snare drum hitsound that you used on the following notes would make this fit the drums in the song better
00:51:354 (2) - I think that moving removing the reverse here and just making it a one beat long curve would fit the melody better here as there isn't really a rythm in the song to support this rythm
00:37:508 (1,2,3,4) - I think these multiple reverse sliders are too quick to react to for brand new players, i think that making them 2 non-reversing sliders each would be better
However the current map it one second under the 30 second drain time limit, maps like this have been ranked before but I'm not really sure how strict that rule is
Cutting the mp3 and then putting the new cut mp3 into the map folder will not affect any of what you have currently mapped unless you cut off the mp3 in a part where you have mapped