Let's see

I don't know what sound you're trying to achive here, but it sounds like Gameboy music. That kick simply gives it away man, FL studio. Dude you need a better kick for starters that too light. Try www.djsamples.com for starters, they have free kick. Try to diverse the drumroll. And the highhat sounds kinda bland. Make it more enrgetic by layering it with other highhats in the background with low volume. The strings sound so dry. Give em delay, reeverb and Try using more than one note for them.