Too short!
I like the original of this song a lot, as it has a very flowing melodic line. I've always loved listening to it and arrangements of it.
Your rendition of the piece is alright in my opinion. Nothing bad, but nothing that grabs my attention and says, "Listen to me!" It lacked a certain level of originality. It sounded close to the original aside from the instrument choice and the high pitched "beeps". It also just repats itself, even before it loops. Here are my suggestions:
-Make it more original; change it up a little more by changing the melody of harmony a little. Embelish it a little more!
-Add some variety; You've got a decent idea, but it's too short. Maybe you could add some more intruments, or change it (even if only a little) instead of just having those few bars repeat over and over.
I did like the strings or pad or whatever it was in the lower register. It sounded fairly close to the melody at times, but with some of your own personality. Try to do mroe of that!
Not bad, but not great. Keep working at it! :)