Not possible. I wasn't changed height of the spring in 68th level. It's the same like in level 8. Tested right now.
I think I might be doing something wrong when on the springs, I got past level 68 but now I am stuck on 69. I also I cannot get the gem on level 42 due to the the same problem on level 69 (The springs). Moreover I was able to do all of the things on Cool Math Games which confuses me even more. If the jump height while not on the spring changes how high you jump if you're on the spring, might be why I cant get to some places.