The problem he's having is that Gemini is ridiculously large. On a completely wiped calc, there's only a few hundred bytes of wiggle room of RAM. If you have just a few dozen archived variables, their VAT entries consume these few hundred bytes and you can no longer run Gemini. I remember that I had this problem too, back when I was in school. So, now that I know how, I decided to do something about it.

I dove into the source of Gemini and made a couple of optimizations. Namely, I reduced two trig tables from five quadrants each to just one quadrant each and wrote code to implement the mirroring. But this slowed the program down a bit, so I also took some time to optimize the speed of some core routines until it ran as fast as it used to.

Hopefully I didn't introduce any bugs. I barely tested it, so it's entirely possible. But since you're eager to play the game, you can test it for me!