Well considering that it's my second spring engine I have a lot to learn about this kind of engine And yes increasing the constant increases the piston capability to pull the spheres and so bla bla bla...I haven't just a lot of time to spend with algodoo recently, too bad, but hey it's summer
Considering you did it with phun it's fantastic 10/10, you could improve graphics or make bullets more realistic but this scene reminds me when I still used phun