Any way to play the game in windowed mode? settings in game have no effect (resolution or the vague "windowed fullscreen mode??"), alt+ enter doesn't work either.

EDIT: argument "winmode" in launcher settings.... man i feel stupid xD
leaving here for anyone else wondering

Sir could you please be more specific? Thank you so much.

For the PC version; right-click on the game's shortcut, view Properties, and add a space and the word winmode to the end of the Target value so that it looks like this:

"C:\GOG Games\Ember\Ember.exe" winmode

When the game starts you can change the resolution in the graphics options to something smaller than you screen resolution.