I’ve never heard anyone say that Flatpaks could result in losing access to the terminal.
My only problem with Flatpaks are the lack of digital signature, neither from the repository nor the uploader. Other major package managers do use digital signatures, and Flatpaks should too.
sgt-puzzles. Simon Tatham’s Portable Puzzle collection.
Contains a bunch of simple puzzles, of the minesweeper and sudoku style. Loopy is my favorite.
Available for Linux, Windows, MacOS, Android, and anything with a web browser and a mouse. Packaged in Debian and F-droid, and probably many other places.
I like it for time wasting in lines at the DMV, for a low-stakes game when anxious, and for falling asleep.