Major new features:
* Ability to change block scale (55-250%)
* Many UI improvements, including changing cursors
* Better scrolling using arrow keys & mousewheel
* Color selector now starts with the existing color
* Internal graphics system rewrite improves UI performance when working with numbers of scripts

System:
* Serial port support on boards that have hardware to support it
* Fast accelerometer sampling and the ability to set higher G range for studying collisions
* Firmware update uses universal hex file for micro:bit so user does not have select between v1 and v2
* New "asByteArray" primitive
* New string split primitive
* Allow user to specify 'number only' or 'string only' for user-defined block parameter types (in advanced mode only)
* Allow enter key as shortcut for clicking the save/open button in FilePicker
* Allow color picker to grab a color from anywhere in the UI window (click in palette, then drag with mouse down)
* Increase contrast of block running highlight in browser
* "save picture of script" command uses the current block scale

Libraries:
* DrawBot library can now plot text (thanks, José!)
* New128x64 OLED graphics library written entirely in MicroBlocks (thanks, Turgut)
* Moved Ringtone library to top level to make easier for students to find
* Scrolling library now autoloads on micro:bit and Calliope

Translations:
* Update Dutch translation (thanks, Cobie!)
* Update Spanish and Catalan translations

Bug fixes:
* Fix: Screen orientation of M5StickC+ was inverted; it now matchesM5StickC
* Fix: SPI send/receive crash VM on micro:bit v1 and v2 (that but crept in with an Arduino framework update)
* Fix: ED1 Buttons library not auto-loading in browser
* Other bug fixes too numerous to list!