[rurtrack]

Making sound sound nice on every device is so difficult, that is why Mastering is so important. But in this case, you'll probably be ok just reducing the volume of the sounds you are playing, and let the user turn the volume up if they want to hear it. I had my volume about 35% and it was still very loud, so that makes me think about maybe you need to reduce the gain a little bit. But great work nevertheless!