Really cool idea and super professionally executed! The art and audio are so charming. I did struggle with the camera and maneuvering behind the particles/throwing them as well as keeping track of which atom I was working on, though maybe that's just a skill issue haha. Not sure if it's a bug but sometimes I was able to move the camera while holding on to an electron (which actually made it a lot easier) though it seemed to also throw it less far / sometimes I traveled with the electron attached to me? It also seems like the electron travels in the direction I'm facing rather than where I clicked, so combined with my not-great positioning it caused them to get sent off to the wrong place and add reactivity :[
My high score after 4 attempts was 1130 (i think)
A casual mode of this with less reactivity gain & less atoms might be fun, I found myself just wanting to make one really really big :]