Intersting, but not promising
pretty much, Gerkinman said it all.
Music - i actually like Brave New World so you had me once i heard the intro. timing with the flash was good
Graphics - honestly, they look like crap. i never knew Megaman could pop his shoulders as he walked. and the whole thick lined drawing turned me off. not saying its awful, but you definitely can do better than that. or at least i hope so.
Characters - the ONLY reason you're getting 5 stars is because i saw Ristar and i never seen him in any other flash. and personally, Ristar is one of my favorite games for the Genesis. as for the other characters, seen them here n there, wanna see how it pans out.
Story - lucky for you, i dont really care a bout graphics nearly as much as i care for story. the story seems interesting, kinda wanna see Sonic, Tails or Knuckles (i know he wasn't in the flash) fight Bass & Treble, I'm curious to see how Ristar gets involved and all that. this kinda reminds me of 'Super Mario Bros. Z' series, without the Mario Bros n without sprites. anyways, it does seem interesting, but my hopes are not gonna up.
I wish you and your brother the best of luck with this series.