Another tutorial series from Emanuele Feronato: "Just like all other Ketchapp games, this game too is really simple: just avoid the ball to fly off the screen by tapping at the right time to activate a wall and keep it into the game.
Tap or click to start and to activate the lower wall.
I was able to build the game in less than 100 lines thanks to Phaser and Arcade physics, and the core of the script is in checkCollision property of an Arcade physics body which allows you to decide whether the body is checked for collisions."