Get the game (Free and Open-source project, nothing to sell you here!! It's a small team of volunteer). Go to the dedicated article on Pepper&Carrot blog : https://www.peppercarrot.com/en/article407/endless-runner-game-by-winterlicht

Credit at the end of the video ( or in the README here https://github.com/WinterLicht/PepperAndCarrotRunningGame )