Oof, cringing at the ergonomic nightmare that is using uppercase for keywords.
I like it. Very Oberon-y.
The unbalanced braces are a real delight.
The bitbucket repo mentioned on the Zimbu home page is dead, but I was able to get a copy from here:
I just compiled it and ran the test suite and it mostly passed on my M1 Mac. This appears to be an older or at least different version from the one described on the website but it looks like it has a fair amount of documentation included.