I'm a big fan of moonscript, but occasionally wish it was still being improved and worked on. Yuescript¹ looks like it fixes most of my bugbears with moonscript, and is for the most part a faster² drop-in replacement.
There was s little discussion here ~18 months ago³, but it will feel largely circular if you look at it as people are suggesting fennel there ;)
¹ https://github.com/pigpigyyy/Yuescript
² This probably only matters if you have tonnes of moonscript, not just a little neovim/mpv/awesomewm config or something.