Heh, the very first thing I noticed was the use of FL Keys, which is fine, just noticing it. Yeah, FL is truly worth it when you get down to it. While it doesn't have some of the same stuff as Ableton or some other programs, it's still pretty neato, and is worth the two hundred you shell out for, in my opinion, the best version.
It's a great song too, you did nice with the piano and chords, etc. It does use a small amount of patterns, which is a great thing to note, the fewer patterns the better right? Well, okay not quite xD Some of the more experienced artists in FL, including myself, use on average fifteen to twenty-five patterns in a single song so yeah, that's a thing. This is a great starting point for your use of FL Studio.
Take care!
~AlphaStorm