Thanks Antony! Here are som links to Phaser, the game engine I used.
Phaser - a game engine - https://phaser.io/
Some tutorials I found useful:
https://phaser.io/tutorials/making-your-first-phaser-3-game/part1
https://gamedevacademy.org/phaser-3-tutorial/
https://gamedevacademy.org/how-to-make-a-mario-style-platformer-with-phaser-3/