[aceazzameen]

Adobe Animate/Flash is still an excellent tool for creating and outputting animated sprites as a sprite sheet with a JSON for HTML5 games.

There's a number of JavaScript game engines that can be used to read and display the data. Even Unity can be used with it. Not sure what they're using here though. I've personally used Phaser with Adobe Animate atlases.

Other tools I see in the YT video are Toon Boom Harmony for the hand drawn 2D animated cut scenes, and After Effects for compositing the videos.

Nice making of. Thanks for the link!

[cableshaft]

I've used Phaser myself, but not with Adobe Animate. I did use to make Flash games back in the day, but haven't in a long time. I no longer have any artists to work with, so I mainly just draw basic shapes or make basic 3D models in Blender now, and use either Phaser or Monogame, mostly.