Running this on my mac, the game appears in only the lower left corner of the window unless I make it full-screen. Which is no big deal because something this beautiful wants to be full-screen anyway. But also it doesn’t save its full-screen-ness, so every time it starts it starts as a bare quarter of its available space.
Still – what a lovely game! I look forward to wasting many hours with it.
Anyway here’s a screenshot of it being too shy to use a whole window.