https://web.dev/media-session/
What does the media session API mean for users? It means media key integration, media metadata such as title, artist name, album name and artwork. It also means assistant support (good for a11y) and picture in picture support (although you'd have to add a button for PiP yourselves, it's a lot easier once you add support for the media session API).
You may have also heard of "PWAs". What it really means is making your web player faster, responsive (so you can shrink the window (great for multitasking, just like PiP is)) and most importantly, including a web app manifest so users can "install" it. There are things like service workers too.
Even when I was logging into my Pandora account to post here and to upvote feedback, there was a stupid splash screen. What are you doing that requires a splash screen??
By the way, this very text field keeps scrolling to the top when I move my cursor by tapping. I'm on my phone by the way. I could only read that banner that tells you that upvoting was added by rotating my phone. Do you not test? Maybe I'm too hard on myself when I do stuff. People expect more of me though.
Oh and consider adding support for the web share API