CaS-Puz is a 3D puzzle platformer where everything is based on the position of the camera. You look at the wall from one side - it exists. You look from the other - you can go through it. But you have to open and close them for your own purposes.
A puzzle and a platformer. Before you make a jump, look around and think. Understand the correct sequence of jumps and camera turns.
If you are a fan of hardcore platformers, then in CaS-Puz you will definitely find a new challenge for yourself.