So I tried playing Keen Dreams with an Xb1 controller, and when I tried to save my game the game just froze and stopped responding to buttons. I had to Alt+F4 out, and when I re-opened the game the save I made didn't exist (it also won't overwrite an existing one if I try to save over it).

The exact steps to reproduce:
1. Run a level.
2. Press "Start" on controller.
3. Navigate to save menu.
4. Press "A" on a save button.

Congratulations, now you can't do anything except force kill the game.

I tried pressing every single button on a controller, ENTER, ESC, SPACE, and who knows what else on my keyboard, but nothing happens.

Also, if you change controls from keyboard to a controller and try to save the game BEFORE you close the menu, this won't happen and it would save just fine. Until you get back into the game and try to save again, that is.