After realising the idea for yesterday was going to end up needing rotating physics bodies (which are scarrryyyyyyy!) I put it aside and started thinking of something I maybe hopefully wouldn't get tired of at the first hurdle.
It needs some swiping actions to work, so I started doing those. I couldn't find any people documenting their experiences doing this, which seems so strange? I think this implementation can be improved but it's workable for now.
And there's going to be some shape creation within this box thing, which means projecting the swipe on to the edges of the game area. Again, workable for now, but doesn't handle rotating axes and I think this will probably end up needing some kind of curved swiping gestures instead ... maybe save that complexity for later.