A nice little song. I think the producing program you use is holding you back. Which one is it? This could be a perfect tune with some adjustments here and there. For example that high pitched note at the end dragged out over awhile is unpleasant to the ear. Maybe variate on stuff towards the end. You definately imbued a tropical, Donkey Kong like sound and feel. Good work, keep at it d00d.
All my songs are actually originally midi, and I just convert them to mp3 with FL Studio. I am relatively new to FL Studio, so I haven't quite mastered this converting process yet.
Please contact me if you would like to use this in a project. We can discuss the details.