Guaguin is a sudoku-like puzzle game that I enjoy a ton. Instead of the usual 9-block square, this has random shapes with a number and a math operator on them. The goal is to have no repeating digits on rows/columns, and each block needs its mathematical problem to be solved. For example a block labeled 20x needs to filled so that all the numbers inside of it multiply to 20.

Play Store

F-Droid

I’ll echo the rest of the comments and say Debian with docker. I use podman myself but the setup should be similar enough. I used the official Jellyfin guide from their wiki and got everything working in a day, including transcoding.