Hello, you can enjoy Spotify music without Spotify app with using other App or playing games. What you can do is convert Spotify music to MP3 in Windows/Mac computer,and then transfer the converted Spotify music to the device for playing without Spotify app.
If you have already subscribed to Premium Membership, you can download songs from Spotify for offline listen. If you are not, you need a third-party Spotify music download tool to free download Spotify music for offline listening, like UkeySoft Spotify Music Converter.
For example: How to transfer Spotify music to Galaxy S10