You'll have to find another source to learn how to do particles in Unity. I wouldn't expect it being much more difficult than in LÖVE, but I'm unable to point to any particular resource besides the docs because I do not use Unity.
oh, no, thanks. I created something like this particle effect via particle system and pixel perfect camera!
Thanks!1!
P.S. I'm making a game like yours, so thanks to you for making those amazing tilesets for free and helping me whit this things to practice on making game!