Gemooy is a 2-dimensional esolang with 3 instructions (5 initial symbols)
which combines features from 2-ill and Etcha, and adds
self-modification. It came about when the author noticed the tape-related
semantics of 2-ill were essentially the same as those of BitChanger.
Select an example program from the dropdown box, then click "Start" to run
it. Or click "Edit" to modify an example program, or create your own program.