The pack is nice, but I don't use Unity. I would love if there'd be a 'space shooter' FX pack focused on lasers / projectiles / shields / rockets / etc.
That way I could use it in any other Game Engine without a problem.
Viewing post in 2D Battle System | Space Shooter Games comments
Since they are 2d assets & sounds I would prefer just raw assets, as then it doesn't matter what engine it's for, I can just load a PNG or .wav
That said, in terms of popularity I think Godot / Unity / Unreal are the big 3.
I use KorGE myself which is a Kotlin based framework, and not popular at all haha. (It's very nice, but still relatively young and not used for any big 2d projects)