TL;DR: I made a Brainfuck IDE, macro language, and a RISC-like VM in Brainfuck. Then I wrote an assembler, linker, and a buggy C compiler for it. Finally I used all of this to parse Doom WAD files and display Doom’s titlepic — still technically in Brainfuck.
Demo: https://braintease.dev Code: https://github.com/ahineya/braintease Full Writeup + Reddit discussion: https://www.reddit.com/r/brainfuck/comments/1n1trwc/i_made_a...