Oh hey, this is a cool beatmap. The storyboard is awesome it really goes with the song.
The timing is perfect (which would make sense because your friend should know the bpm).
Great use of sound too. Whistles, claps, and finishes were great.
There are slight jumps in the spacing of some beat circles (for example the circles at 03:448 and 03:877), which is odd because it looks like you used distance snap. What level grid did you use? Try using a level 3 grid for more accuracy if you didn't already do so. If you did plan those jumps I guess its fine then.
The placement of some beat circles seem a bit too random making quite difficult to play. But maybe that was your intention it is the insane difficulty.
I couldn't last 5 secs. on the beatmap. I'm not very good at this game, just look at my rank. Just wondering, are you able to complete it?