change up the melody, try going up or down the scale or going slower or faster with it. not bad for a rookie.
this is pretty good.
the melody is to repetitive for a ten, but otherwise it's a good song.
remember, no matter what type of music you are doing, mix it up. dont just do the same thing over, and over again. it gets boring. change the rythm and melody up a bit. heck, you can even thro in a counter-melody to add some depth.