Well, not sure how elegant this design is, but here's my Brimstone contraption. Rather proud of this one:
b,8,13;c,1,9;t,3,7;b,5,6;c,7,11;t,13,6;t,11,6;t,13,2;m,5,13,0,2,odrrcllu;m,13,13,180,3,owddcuuw;m,1,13,0,1,cluuoddr;m,1,7,0,1,owrwcwlw;m,3,9,270,1,cuodwwww;m,1,6,0,1,wwcuuodd;m,9,11,90,1,cr2rollw;m,6,8,270,1,ourwcwdl;m,9,6,180,2,cwrrowll;m,12,4,90,1,clwlorwr;m,10,2,0,2,clwlorwr;
I got a(n) A- on hard! My score was 2951915 with a max combo of 274. I scored 225 perfects, 117 greats, and 13 goods. I got only 2 bads and 0 misses! I was playing on 5 speed and had 0 crazy options on. Great game, I like it! Play it here: http://www.thorgaming.com/games/3926/feel-the-beat.html
There are no challenges added yet, but I will add a few soon. Although probably no Arty challenge :D