How is this "Scheme" in any sense of the word? When I look at that code, I see an implementation of something that compiles simple s-exps containing basic arith

How is this "Scheme" in any sense of the word? When I look at that code, I see an implementation of something that compiles simple s-exps containing basic arithmetic to ruby byte-code - that sorta misses...everything... that makes Scheme Scheme. That being said, fun demo.