Thank you for the feedback! I've realized that having the game actually get difficult after 5000 points was a slight mistake and will fix it while continuing development.
Viewing post in Attack of Mechaningale jam comments
I've made a game similar to this (arcade base game with progressive difficulty - "Drill thrill" - you can try it and see how I approached the same problem - that game is nowhere near good, but the points system worked great - every 1000 pints (out of 10 000 that are needed to beat the game) something happened