This is a kind of fairly basic drum & bass track. It just sounds really amateur, and I can't think of any other word that describes this.
Your melodies are cool but the way you organized this track ; it'll fit more into some sort of menu loop music for a game. If you want to really brighten up your music, you have to put in a lot more effort into this. I hear no EQ enhancements, no background fx, no build ups, just random ideas put together on top of a beat.
You have potential, so please don't get discouraged by my reviews. I am pretty blunt when I criticize people ;)