Looks interesting, but what I have in mind is something that would try to use something else than text entirely, something more geometry-based, and be powerful

Looks interesting, but what I have in mind is something that would try to use something else than text entirely, something more geometry-based, and be powerful enough to be a general purpose programming language. I'm not even sure it's possible, and I find myself asking the question "Can a general purpose programming language be entirely textfree (a.k.a. not based on a string of symbols/tape of infinite length)?"