It is heavily inspired by CoffeeScript (and Python), it works as a transpiler for Lua. I've since used it regularly to code dozens of projects.
It's now powering my company along with a handful of websites and supporting libraries. I've also made games and GUI apps with it. The adoption has been pretty minimal, but I'm satisfied regardless. It has definitely improved my productivity.
Since he doesn't want to mention his company, it's called itch.io. It's a game marketplace -- kind of like Steam -- but with a ton of pretty interesting ideas when it comes to advertising, pricing, etc.
The really cool thing is that the site is written entirely in MoonScript AND uses the Lapis web framework, which he also wrote entirely in MoonScript.
Anyways, if you're ever looking for a place to host and/or sell your game, itch.io is definitely the place to go.
Please don't give up on MoonScript :)
In the future I'd like to be able to run MoonScript in the browser, maybe web assembly is the answer.
Another option would be to have a JS target for the MoonScript compiler, but there are some issues with different language features that would make code sharing difficult (1 indexed arrays, metatables, etc.)
I have no plans to give up moonscript. I haven't been actively developing it recently though, which I feel guilty about.