A similar language that was created to make creating GUIs more pleasant is Jakt [1] for SerenityOS which is Impressive to see how fast they've been able to develop a pleasant modern native language, went from 0 to rust-based then self-hosting compiler inc. VS Code static analysis & intelli-sense in weeks.
Like most of SerenityOS you can follow much of its development is on YouTube [2]. A good video series that captures the language ergonomics is in the "Jaktness Monster" series which goes through creating a NES Emulator from scratch [3].
[1] https://github.com/SerenityOS/jakt
Any idea what kind of effort it would take to get Jakt working on another OS?
Even though it doesn't require SerenityOS, even SerenityOS GUI apps can be ported to run on Linux, Andreas already has ported its Ladybird Browser that wraps SerenityOS LibWeb engine in a QT App [2] to Linux, his last video shows "Abstracting the event loop so Ladybird can be fast & responsive on Linux" [3]
[1] https://github.com/SerenityOS/jakt#usage