In that example, one of the lines of codes is too long and when the program is run the editor does not open the output (black) window. (I tried all (most of) the other examples and they open the results window correctly.)
You need more examples of different things the language can do.
I agree! However, the reality is that it is quite limited. Additionally, there are also some bugs that need to be addressed.
I spotted vainilla.app in your repos is that the same?