IIRC one of Hedy’s unique features is that it gradually increases in complexity as you “level up” including introducing what we’d call “breaking changes”. At level 4, they start allowing and requiring you to quote string literals: https://www.hedycode.com/hedy/4#default
I'm excited for my son to try it out once he's gotten comfortable with scratch.
At the moment, he's more interested in the visual design part of scratch than the programming, so I probably need to find some cool existing animations to inspire him.