This is a clone of Flappy Bird made for desktop platforms, for a video tutorial on YouTube which you can find here. This video shows the narrated creation of this game from scratch, in about 3 hours including short explanations of what is being typed, and why.
LWJGL 3: Light Weight Java Game Library 3, which you can download here. You'll have to manually add the JAR and native files to your classpath in order to build and run the game.