You can technically log in to the TurboWarp website to comment and save, but TurboWarp accounts are separate from Scratch accounts. You cannot log into TurboWarp using your Scratch username/password directly.
: A free, open-source game engine that uses a "no-code" logic system similar to block coding. It is much more powerful for building professional-quality 2D games than standard Scratch. Scratch Turbowarp Alternative Free
The UI looks like it is from 1998. The learning curve is steep. Kids used to Scratch’s colorful ribbon will be confused. You can technically log in to the TurboWarp