First! 
https:///jam/2018-spring-ue4jam/feed
Game can be downloaded here: https://tdvance./mercurial-cube
Video (5min) of a playthrough: ?time_continue=1&v=rVejy40O0vE
Mercurial Cube
You start in a room of a big cube. Find your way to the center!
Mercurial Cube: A First Person Puzzle by Deplorable Mountaineer, built on Unreal Engine 4.
Keyboard/Mouse:
Move: WASD or RMB to move forward
Operate: (open a door or press switch to rotate the entire cube) LMB or E or F
Jump: Space Bar
Crouch: C
Quit Game: Alt-F4