A creative and fantastically tense little experience! I will say though that the candy physics were rather finicky, and certain commands didn't seem to work (M for menu, closing the door)? Still, delightfully eerie :)
M or escape should open the menu, maybe it's a keyboard localisation kind of bug ? The physics were tough to implement... 2.5D is always a headache
The menu bug is now fixed. But you didn't miss anything it contains mainly the settings.