There's PICO-8 in this category if you haven't already heard of it, it uses Lua as the language for writing programs. It was another huge inspiration of mine while working on Bedrock.
I've fantasised about turning LOAD81 into a much more full-featured development/execution environment for years, and have done a fair bit of work on extending it to support other things such as joystick devices, an internal sound synthesizer based on sfxr, and so on .. one of these days I'll get back to it ..
https://github.com/antirez/load81
I've fantasised about turning LOAD81 into a much more full-featured development/execution environment for years, and have done a fair bit of work on extending it to support other things such as joystick devices, an internal sound synthesizer based on sfxr, and so on .. one of these days I'll get back to it ..