Pico-8 fantasy console uses Lua (a subset of; with Pico-8-specific console APIs). I keep going back to it in my personal projects time and again. I always think, "OK, I'm going to build the next thing in C" and wind up falling back to Pico-8 and Lua.

The in-the-works Picotron will grow from Pico-8's roots and present a full fantasy computer, with an OS, windowing system, etc. and expands Lua support to the full v5.4 language.