On: Rogule: A dungeon a day keeps the Balrog away

[almostnormal]

The manual ("?", top left) says "press the . key to rest".

The big dot between the cursor keys doesn't seem to do anything. And on mobile there's no keyboard to push a . key.

[themodelplumber → almostnormal]

It's the button in the middle of the graphical arrow buttons. You need to tap it more than once to see your health start to go back up. Similar to other games of the type.