Thanks for playing! I'm glad you got to the end of the story :D(I was worried that people will click out because of my 1 minute long intro)
For the particle effects I just used an explosion particle effect set up from unity I used for my past couple of games(I think it was the first 2D one when I searched particle explosion I could find it if you want). I'm still experimenting with it, and hopefully I could add more particles(To hide my lack of visuals hehe)
Thanks again!