Wase presented Kami, a free, open-source paper-folding simulator (no, we are not going to talk about the differences between origami and paper folding) that reacts to the screen folding and its direction.
Don't worry: if you don't have a Samsung Galaxy Z Fold, Flip, or another similar device, you can still play the game on any other smartphone in a non-Chrome browser and fold paper by using a button. There is a demo if you wish to try it out.