This is another part of the Shift game. You can find other parts here: Shift
This part is also based on the same principle as the previous ones just at later levels you can control two characters at the same time.
You have a set of platform levels and need to get to the exit door in each one of them.
You run with the arrows and jump with space.
The original part is that you can reverse the level whenever you want.
If you press Shift the level is spun 180 degrees and platform and the open space switch their
places meaning that if the beginning you were running on black platforms and the white zones
were your open space, after pressing shift the white zones become platforms to run on and the
black zones turn into the open space.