Thanks for the detailed response! Yes I'm planning to put the sparkles on the highlighted stones as well, I was a little too hacky building them earlier on in development so It will take just a little extra work to get it in, but they certainly will get it at some point!
Render distance will probably need a sweeping check through the whole game, it's a bit lower on the priority list at the moment but will probably all get cleaned up at some point in the finale build.
I really only restricted projectile fire because otherwise it would be too easy to spam the balloons and nearly eliminate any kind of challenge. I liked rapid firing and piling them up myself, but I think it was a necessary move XD Thanks again for the comment!!