“Shedding snake” reminds me of a game I made on my Casio CFX-9850GB+ Color in high school. It started out as snake, but keeping track of the positions of the snake’s pixels in an array or matrix, even if treating it as a ring buffer so you weren’t constantly shuffling all the values in it, was really slow, so that by the time the snake was even six pixels long there was not the slightest bit of challenge to it because it was moving less than two pixels per second (and by ten, below one). So I turned it into what I called Snail Trail, with it just laying down pixels behind it and never keeping track of them, because you could query “is this pixel filled?” much more rapidly (and it was O(1) rather than O(n²) or worse). That was much faster, and I rapidly worked out the optimal strategy. A year or two later I transferred it to someone’s newer model of calculator which was generally about six times as fast, and… yeah, I had to insert busy loops to make it playable!

I had good times with that calculator. 32KB taught me frugality not unlike that needed for competitions like JS1024, and how to find that there was a character/instruction akin to a semicolon in Python that took one byte, where the new line character/instruction took two bytes. (I only obtained a manual for the calculator after having it for two years. Figured out one or two new tricks after that, but I’d worked almost everything possible out by trial and error.) So power efficient, too: I changed the four AAA batteries only twice in more than three years of very heavy usage (looking back on it, I probably got more than 200h of life from each set), while all the rest of the class that had the newer, faster version (except one other who had the same model as me) would need to change them around once a term, and they didn’t use their calculators even a quarter as much as me. I’m going to guess figures of a CPU 6× as fast and power consumption 30× as high. And those newer ones were even only monochrome rather than three-colour LCD.

Then after I left they shifted to CAS calculators and battery life was a zillion times worse again. And laptops, phones and such will be even worse still. Ah well.