Ooh I love this, it sounds magical :D
What an amazing use of Sylenth1, the synths in this sound great! The use of lowpass was interesting too, as it just brings out more of the bass and there aren't a lot of high frequency noises on the leads. In a way it feels kinda nostalgic almost? The portamento at some parts sounds amazing too, I can't get over it haha. I just wish this was longer, its such a beautiful melody! Please keep up the awesome work :)