An update - v0.4.1a

Man it's been tough.
My brain won't let me finish anything.
Here, have lots of half-finished pieces so I may one day be persuaded to wrap this up more nicely.

There's a new enemy. Not quite done.
The world is now procedural. Very far from done.
Sound on desktop is barely functional, and of course a far cry from emulating the nice little piezo speaker on the picosystem.
I'm very much done for now, I hope I'll pick this up again one day.