Thank you ! We intend on adding more sounds, effects, etc. to make the game feel more 'alive', we'll try to continue this game for as long as we can, as we got quite the good feedbacks, and think that it deserves to be polished and fixed the way it should be at term. We'll try to post an update right after the voting phase ends, so stay tuned if you're still interested then !
And yes, we used 2D lightning to create the effects, with the Universal Render Pipeline. :)