Game name:

SHIFT

Description:

First click on "SHIFT" on the title screen.
Switch to white and black and go to the door.
Is the floor the roof? Is the roof the floor?
Let's think.
Controls:
Use the arrow Keys to Move.
To jump, use the spacebar.
Use the Shift Key to Switch white and black.
To pause and use the P key to display the menu.

The game play Video.