The game offers a specific soundtrack for each level and you can't replace or modify it.
It's important to note that the collection is a compilation of older Sonic games with their original soundtracks.
If you're interested in playing with different music, you might consider:
* Modding: Some dedicated fans have created mods for certain Sonic games, which might allow you to change the music. However, these are usually unofficial and might require technical expertise.
* Other Sonic games: Newer Sonic games might offer more options for music customization, like in Sonic Frontiers.
Let me know if you have any other questions!