Yes its made using Gdevelop and the music is not mine.
Great work in GDevlop, and great to see this kind of stuff where the "game" can interact with music in different ways (and the music was very suitable for this project)! I checked out your youtube channel, I like what you do! If you need some more original music for your projects, do contact me if you wish (you can check out 2 tracks of mine I just uploaded to Itchio).