It started with thinking of the idea of the minimalistic language, but it's more than that - I had to set up the whole environment for it: I have written a macro-assembler, an interpreter for the binary, and a very extensive standard library. I also written about ~30 programs in it. Also, the standard library is tested.

I also wrote an esolangs page: https://esolangs.org/wiki/FlipJump

Tell me what you think!