Ehh,
First of all, well done on completing a piece!
This is going to be honest criticism.
1. The intro is way too long, in the sense that it's just a simple drum loop repeating for almost 1 minute straight, no build up other than adding a different instrument to the loop maybe every ~20 seconds.
2. Are you using the (if you are using Fruity Loops Studio) basic vst plugins for FL Studio (FL keys, wasp, two I believe you used in this track from 1:28, 1:43)? If so, I suggest toying with the effects and their 'knobs' to produce a better sound. Also, try adding chords to your melody in the piano roll. Another suggestion would be to look online for some free VST plugins, and there are some really good ones out there that can give a high-end producer sound.
3. Variation to the melody and beat itself.
I noticed that it's the same melody throughout the whole song, as well as the same beat (kick, snare, etc.) and you occasionally add in the piano. A suggestion for next time would be to maybe raise the whole song up a key or so, or tune with the notes a bit.
4. I like the bass in the beginning. It's a very 'punchy', powerful sound and messing around with it with some automations should make that sucker sound beautiful.
Hope I could be of some assistance, if any, to you and make your next submission even better!
Overall; well done and good effort into this piece.
3/5, 7/10.
Cheers,
dj JPA