Fun game overall, I don't know if it is because it is on itch.io, but it is very laggy and it's quite clunky.
It is a nice concept for the jam.
Viewing post in Nuke n' Rally jam comments
Yes that was something I was concerned about, I think being on html5 makes it tougher on slower cpu's because of single-threading. I noticed on my macbook air it would hiccup every time a gpu-particle was initialized for the first time. I tried to workaround this by firing every particle at the start, but don't think I was thorough enough. From my testing it should smooth out to 60-260fps after about 30 sec.