Nice bit of rage bait, although I didn't use the parameter scaling at all as any changes just seemed to lead to failure. I think part of the problem is that with the tight time limit and lives the player doesn't really get a chance to experiment with the scales, so instead I found myself optimising my route with the default values. Perhaps introduce some sandbox-like sections where the player can try out different settings with no time limit before they move onto the next timed section. Fun game though, and a nice idea.