Hmm
It's hard to review piano songs when I create them and then my style is mimicked. So my criticism can be harsh.
Firstly, this song is not good for a piano song. It's the fact that there's too many notes and it's too high paced to sound natural. By slowing it down, the ambience of the song is destroyed.
Continuing on the note part, you simply included every track. This caused it to be all jumbled and such.
Next, the range of notes was too wide for a standard piano. Because of that, it sounded too fake.
As well, your piano synth wasn't that great. What program are you using to make the synth? If it's FL Studio, I recommend you use FL Keys. It is a great starter for piano stuff.
As well, a note to the rest of ya, PLZ stop copying styles. Find your own unique trait, and it'll make you popular like me and Chronamut.
Ciao!