3xN grid too wide for small screens; vertical scrolling
First, thanks for making this app responsive. I can already use it well on a OnePlus 6 (PostmarketOS).
When selecting e.g. "Cats and Dogs" or "GNOME Mini Corsswords", the different corsswords are presented in the columns. This is fine on the desktop, but on a narrow screen, it would be better to have just one row.
But even on my desktop (HiDPI, 2x scaling), the minimum window size is too large. So here, a vertical scrolling would be nice.