Hi! The EffectBlocks pack is primarily a 3D VFX pack but can be used in 2D games by rendering into sprites via the pixel renderer. Also you can render not only in pixel art (but can go upto higher resolutions like 512 px as well). You can also rotate the effects to adjust for the best viewing angle for a top down view as well.
The only issue here is these assets are not native 2D assets. If the art style matches the game and you are fine with using animated sprites for VFX in your game, EffectBlocks is a good option for you!