Its pretty easy. But you can make a "foolproof" system that relies on events that happen over time, not through artificial interaction by someone to exploit. Like, radioactive decay, or, creating of GRAV, BCOL with Sand Effect mode (The upper right button). i have noticed that the patterns between lighter and darker deco is a sine, so this could be made into a machine, its hard to replicate.
blurcat: My counter is not so easy to tamper with... :)
It's possible to build a manual counter that is extremely difficult to tamper with without lots of TPT experience.
you can't really prove that you got a certain score because someone could easily edit the counter to show any number
what have you done. you've domed us all.