Sorry, did you perhaps skip the tutorial by mistake or did it not show up at all? It should appear automatically after the short intro, explaining all keybinds and mechanics.
Anyways, darkness = dying is a cool idea I haven’t thought of. I could make it so that the player dies after a while of being in the dark, kinda like Don’t Starve.
I hope you were able to enjoy the amount of game you managed to play and thank you for playing!