FXGL is a Java, JavaFX and Kotlin Game Library (Engine) made by Almas Baimagambetov. As my son (almost 10y) challenged me to make a game during my “Corona-stay-at-home-time”, I had the luck Almas guided me through this library to get started. This is the result and the code is described on webtechie.be/post/2020-05-07-getting-started-with-fxgl/