A spreadsheet it just a view broken up in to rectangle cells and that compares favorably to the JavaScript smalltalk variants I’ve seen online such as this one https://amber-lang.net/

The output when it’s not an error message can redirected in to another function and so on and so forth until it’s not entirely programming and not entirely a prebuilt interface. A smalltalk VM is like an operating system as a repl as long as you’re skilled enough to not keep hitting error messages.