This started as a way to test out doing some effects with 16 column stack rendering.

Now it's become kinda a little mini-game demo.

And it's become a 14 column stack render. Pixels, plus attrs, plus sprite... all in single frame. Going to 14 not only saves a push/pop, but also the EX AF.

Oh and the score in the top border! (which I POC'd earlier https://github.com/mtg101/ZX-Scoreboarder)

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Z/X to move boat.