And Yet It Moves

And Yet It Moves is an award winning physics-based platform game where you run and jump through a world made of paper. To aid in solving the twisted mind-bending levels, you possess the unique ability to rotate the world at will! Walls become floors, slides become platforms – but a harmless pile of rocks becomes a hazardous danger when turned upside down!

Minimum system requirements: 

CPU: 1.6 GHz dual core or 2.0 GHz single core (x86 compatible)
RAM: 1024 MB
GPU: OpenGL 1.2 compatible with 128 MB VRAM

External links:
Developer: Broken Rules