SNUSP is a “two-dimensional” esolanguage. You can find more about it in these links:
And many more on the nets, if you search.
There exist enhancements to the initial (core) language, which is called in fact Core SNUSP: Modular SNUSP adds “calls” and Bloated SNUSP adds basic concurrency, 2D cells “lattice” (memory) and randomness.
GoSNUSP implements Core, Modular and Bloated SNUSP in the Go programming language.