It took me a minute to figure out the best way to shoot the nodes, but it is a cool idea! Maybe you could use a tween to show the counting of the shots, which would ensure you always have the same wait time. I waited a lot on the first level :D
oh dear, I'm sorry :D didn't think of the way that might misread, I used to have an animation on the staff, but lost the project in the middle and that wasn't important enough to rebuild :D thanks for playing :)
