Yes, it's more than a REPL. It doesn't work at the level of single expressions. It's more like a script editor that re-runs the script in realtime, as it's edi

Yes, it's more than a REPL. It doesn't work at the level of single expressions. It's more like a script editor that re-runs the script in realtime, as it's edited. It also allows real-time inspection of values, with useful visual representations (e.g. graphs of values over time, colours, paths, images etc.) It's pretty cool, though I'm not sure how much use it is over a regular debugger for an experienced programmer. Great for playing around with though.