Hey there! Within this I'd like to give you general feedback to your song and take the occasion to answer you to your comment on my soundtrack.
I have chosen this piece to give feedback to since that's a genre I enjoy listening to very much!

First off, this definitely also falls under the 'swing' genre. It has many characteristics of it and I personally would even say this is more familiar with swing than jazz.
What I enjoyed is your creativity for the chosen melody and chords. Your choice of instruments is excellent as well. They fit very well and I also like the Xylophone, which gives the piece something playful to it.
I personally would have chosen another tempo. Music of that kind usually works with a BPM range of 110 to 130. Your soundtrack is a little bit too hectic and in my opinion the general expression would have been even better, if the BPM were slower.

Now about your comment. Please don't feel like you have no talent at all. Because that's definitely not the case! You are in age of 15 and what you did was comparing apples to pears. Without knowing for how long you've been into composing, I already know that I have way more experience than you. Everyone starts off small and the time will do it's job if you keep practising, believe me! And to be straight up honest, I believe that your stuff does sound way better than what I did in age of 15. So just keep it up and improve! :)