Ok, I need to at once give criticism.
First off, if you are going to make a piano only piece, make it on a real piano. Synth piano sounds so fake, especially if it is FL Keys with no effects over it.
Now, about the melody, aside from synths. The melody was not good. It jumped around a lot, didn't flow, and had no base. Piano only pieces are supposed to be flowing pieces, with as much bass keys as treble keys. When we hear piano in Music Theory class, it is always deep and smooth, moving and full of emotion... This was just a bunch of random chords repeated, with no structure, so a lot didn't fit.
If you are going to do a piano only song, learn some theory, and record it on a real one. Stick with synths. This gives me a headache =\