No offense...
But its kinda dull. I mean, its just one instrument. I think when you do this again, try to seperate the melody into layers and then have seperate instruments play out seperate parts of the melody. For ex have maybe a flute play the higher notes, have base down at the bottom, and so on.
Also, get some drums or beat or something! The song sounds so lacking without them.
I haven't heard the original song so meh, but I hope this is helpful in further remixes/songs! Keep trying :D
And if you have time, check out some of my audio. Thanks ^^