Purity 1 Hey, don't listen to that dude "changes feels", whatever does that supposed to mean? It's a solid concept from start to finish, it's in key, and sounds pretty good.
Although in my opinion some of the vst you chose sound a little corny. They make the piece sound like it's an old jrpg soundtrack. I mean if that's what you were going for, that's alright then, but if you want more realistic sounding instruments, maybe you should try Kontakt.
I use FL 12 with Kontakt 5 and some of the string instrument sounds in that are just amazing.
But that's just a suggestion, it's a very nice melody.