Learn to Build a Sonic Themed Infinite Runner Game in TypeScript with Kaplay
jslegenddev.substack.com
jslegenddev.substack.com
As for Phaser VS KAPLAY:
Performance wise, Phaser is still better however there are perfs improvement coming to KAPLAY.
KAPLAY has an easier to use syntax for its API. Things are easier to do in KAPLAY VS Phaser while being less verbose. Phaser however, has more features considering it's more battle tested since it's been around for far longer.
I recommend joining the KAPLAY discord to see what others are building. I'm not aware of any famous games made in KAPLAY yet.