Belo&Cherno

It's an adventure-puzzle game in 2 worlds. First is dark one, second is light one. Use your "main gun" to understand where are you. Find and capture light-emitting cubes to place them for powering doors. Kinda short game, but "white" world can take a while. 

Controls are displayed in game. However here they are:
WASD - Walk
Mouse - Camera move
LMB - Scan
RMB - Switch scan mode
Space - Jump
Shift - Switch worlds
ESC - Menu

If hints inside the game doesnt help, so there are few:
1. In "white" world cubes are on pillar behind you, on second pillar on second pillar on your right and diagonally forward-left (3 in tota).
2. In "dark" world with 2 buttons, better start with left room.
3. Walk diagonally little bit faster