hmmmm
i'm in two worlds about this. on one hand it sort of looks like you just freehanded other stills from anime. for example, the main character evading the scythe looks suspicously like edward elric. if that's the case, then i wouldn't usually rate it and say that you suck, etc.
but there was elements that you clearly didn't rip off, which interested me. however i think you're puttin too much detail into the faces when there doesn't really need to be that much if it's just an action sequence. furthermore, i think you overdid it with the black flashes and the backgrounds just weren't there for a lot of frames.
i suggest doing a few movement tests, like walk loops, runs, jumps, kicks, etc. from different angles to get your style down in order to make a long, decent quality animation that people can respect and call original.
i'm still new to proper fullbody flash and i have to practise a lot as well, so i know what sort of challenge you're up against.