The concept of infinity can be hard to grasp. Other than the Energizer Bunny, space, and Buzz Lightyear, there is not much regular exposure to the concept of something that goes on forever and ever and doesn't stop. Our puny human brains are only capable of so much!
Leave it to Jason Rohrer, creator of Passage, Sleep is Death, and more recently Diamond Trust of London, to create a videogame that explores the concept of infinity so incredibly well. Inside a Star-filled Sky presents you with so many opportunities to fix your setbacks, all while exploring infinite space inside what is essentially a twin-stick shooter. Seeing as it takes place in infinite space, there are no win or loss conditions -- just moving forwards and backwards continuously. And it's incredibly entertaining.