Bouncing Balls: A Simulation With Particle Collisions

I've now reintroduced particle-particle collisions. The combination of border, wall and particle collisions has made resolving positions a little trickier. As a result, there are frustratingly some incursions into the wall in the top right. However, apart from that, I'm pleased with the result. I have an idea how to fix the problem and hopefully the next video will have positive news! Music by @Zavertal. Enjoy!