Been using Pocketbase for almost all of my projects lately. Its realtime database is especially nice to introduce multiplayer functionality with relative ease.
It plus SvelteKit has been a dream to get up and running using the JS SDK.
For CRUD apps, sveltekits progressive enhancement and form actions make it quick to to add simple function to the page. You can store the pocketbase instance, pb, in locals and reference it all over the application.
For more multiplayer things, sticking a client-side subscription to a collection allows updates of elements that can be worked with/added/moved around etc.
It plus SvelteKit has been a dream to get up and running using the JS SDK.