Nice attempt, heres some advice
The piano melody is quite nice, but it feels quite empty due to the fairly cheap sound of the piano. It might need some reverb on there to make it feel a bit more full, perhaps even a 3 step delay. The second synth feels out of place given that its a classical piece; it would much better fit in a dance track. The third instrument (rhodes/EP?) sounds really out of place as well. Nice, but not for classical music.
Its also a bit monotonous, but the changes were enough to keep my attention for the whole piece.
Use instruments that are more closely associated with classical (IE Strings, brass etc)
You could completely change the direction of this track. Add a simple 4 step kick pattern, with a clap on the second and 4th kick, as well as some deadmau5 style bass, you could have an interesting sounding dance/house track out of this if you wanted.
Definatly a good attempt though, keep at it! :)