There’s a little, top-down hack-and-slash, strategy/tower defense game built on this premise of “dad-mode” called Thronefall. I’ve found it fun and sufficiently challenging.

It’s pretty easy to get through almost all of the content and leveling progression, but the developer puts out content regularly, so there is almost always something new to do every time I go to pick it back up.

It might be something you find entertaining.