Wow, I started designing a language called Crystal in the 90s, which a) looks similar to this, and b) I'm pretty sure I even bought the domain crystal-lang.org

Wow, I started designing a language called Crystal in the 90s, which a) looks similar to this, and b) I'm pretty sure I even bought the domain crystal-lang.org at one point, but I never did anything with it! I had a very similar logo too :)