I'm having some trouble getting this to look as advertised in a 2D engine like Gamemaker, is it not meant for that?
Viewing post in RPG MAKER MZ Animation - Slash comments
Hello, these are not made for Gamemaker, it was designed for RPG Maker MZ (and other engines supporting Effekseer)
That said, there are ways to use the Effekseer software and record this as a spritesheet then use it in every engine (as a PNG)
Here is the link to Effekseer software:
https://effekseer.github.io/en/download.html