I tried the "latest development build" dated 27/03/2020, and I still have the issue with the UI having very small text/buttons. So back to 2.0.0 for me! *EDIT* so the above was with the ARM32 package on my Minix box connected to a TV. I installed the ARM64 package on my phone, and the GUI ...

Yes, some Humongous games have the save/load option within the game menu (typically by clicking in the bottom left or right corner), and some can be accessed with L and S keys on the keyboard.