[tinco]

The syntax looks very pretty, but why the colons at the end of block header statements? Python does this too, but I see no reason for it. In my opinion that makes it look a bit cluttered, contrast it for example with the (excellent) coffeescript syntax.

[dscrd]

Colon + indentation is actually the most natural way to signify a block that I have ever seen. Pretty, non-cluttering and sort of light for the eyes. And it's not without precedent: it resembles how colon is used in text.