In the second part of this series the prototype is updated so the jump is handled using cubic bezier curves.
From Emanuele Feronato: "This is quite a long title but I have a lot to show you. Do you remember both my Phaser 3 “Down the mountain” prototype and the tweens using cubic Bezier curves?
I merged the prototypes in one so now I can fake a 3D jump just using tweens. This is not affecting game play but it’s a feature which will make your game look polished."