Stop fighting the lag. Pick one of these alternatives, export your project, and watch it fly.
MakeCode Arcade simulates a retro handheld console (160x120 resolution). It’s block-based but feels entirely different from Scratch. Scratch Turbowarp Alternative Free
Snap! does not use ".sb3" files perfectly. It has its own XML format. It also looks different (more "technical") than Scratch, which might intimidate very young kids. Stop fighting the lag
A fork of the Scratch 3.0 GUI designed for the TurboWarp compiler that focuses on a multi-language IDE experience with extra add-ons and themes. export your project