Can you guys give me your impressions on this and offer some advice on what I could do to improve it.

I did it with a guitar synth using SampleTank and wanted to ask a few things like..
does it sound natural enough... does it flow properly...

Like, what would you do to improve it?

http://s93744050.onlinehome.us/mp3/Eventide.mp3

Another question... I composed this myself.
Does it sound original or ripped off?