Pico8Lisp: A toy Lisp interpreter for PICO-8 (opens in new tab)

Also notable, TIC-80 is an open source PICO-8 clone and it has a built-in support for Fennel. A step up from toy Lisp, Fennel is mature Clojure-inspired language that runs on Lua platform.

https://fennel-lang.org/setup#using-fennel-in-tic-80

see also: really a toy lisp for the original fantasy console, CHIP-8:

https://internet-janitor.itch.io/bulb