Creativity

I came across this giant comparison table of eReaders last time I was researching an upgrade. While it doesn't list supported file types, anything running an android operating system that lets you download apps for reading from google play would meet your needs.

https://comparisontabl.es/e-readers/

I can't think of any short playthrough games off the top of my head, but Valheim might work if you're open to something longer.