That's kinna like the story about the guys who coded a Tron lightcycle game on the Apple II. Failure to properly bounds-check the lightcycle position meant that the cycles could be driven off screen, corrupting main memory and the game code itself -- much like what happened in the move Tron.

Story: http://blog.danielwellman.com/2008/10/real-life-tron-on-an-a...

One of the most brilliant applications of this concept is the Pokémon Yellow Total Control Hack: http://aurellem.org/vba-clojure/html/total-control.html

Similarly, arbitrary code execution in Super Mario World: https://www.youtube.com/watch?v=OPcV9uIY5i4

It's like transforming a chess game into Mikado just by playing it.

One thing I've often wanted to do, but didn't have the time to, was to take Turing Drawings: https://github.com/maximecb/Turing-Drawings ( faster asm.js variant here: https://github.com/darius/Turing-Drawings ), which runs a random Turing machine to generate abstract art and put the machine description in the image itself, so it could self-modify.

The links you gave are fascinating! Believe it or not, I have done something like that, too: http://imgur.com/gallery/sRUrI

To be fair, that seems to require turning off in the middle of a save. Not entirely by the rules of the game.

I was looking through the source and learned that Python's modulo operator is based on floor-division (rather than round-toward-0 division like in C). In case anyone cares how Python actually does in in C, for small ints its defined at https://github.com/python/cpython/blob/master/Objects/longob...

This is really cool and I'd love to play with it, but my eyesight isn't good enough to hit the ball more than once at a time. Is there anyway you could post an upscaled version?

Updated it. If it's still too small, just right click, inspect element and choose a custom width and height.

CTRL-[+] in your browser?