It seems almost a right of passage for a programmer to build/attempt a lisp/pseudo-lisp implementation. Quite honestly, when I made my (very poor) attempt, it was one of the most fun, and most frustrating projects I had done at the time, and I would highly recommend every developer have shot at building some kind of lisp.

One thing I did notice in this implementation, is the lack of quoting and cons notation. Although, cons is a weird one in the lisp world given it is the only infix operator in the language.