I didn't understand the language but the examples look amazing. Are there any others like that?

Edit: Another one is Cellpond https://cellpond.cool/ https://github.com/TodePond/CellPond

While both MJ and Turnstyle are Turing-complete, Turnstyle shares more similarities with Piet (mentioned by the author), Wireworld, and, of course, Conway's Game of Life.