Lumen

The initial screen is a difficulty matrix of the size of the map (i.e. 15x15) and density of mines in the map (20% of cells are mines) 

Warning: 21x21: 30% may take a long time to load, let it cook 

Controls: 

WASD to move 

E to select 

Q to cancel 

Hold SPACE to bring up mark menu 

Enter to Pause (Pressing E on the pause menu brings up controls / how to play) 

Z to control SFX Volume 

C to control Music Volume 

Gamepad is also supported

Mark Menu: 

WASD to navigate 

E to mark mine 

Q to mark safe