Focus on upgrades that give the best "Cost-to-CPS" (Clicks Per Second) ratio.
While there isn't one definitive "official" version 2, you can find high-quality fan sequels like Chicken Nugget Clicker Version 2.5 (and even version 3.0) via the Scratch community remixes.
While the official has anti-cheat detection, some console commands work. Open Developer Tools (F12) and type:
: This version by Protective Mark is a popular community project where players click a central nugget to earn points and view basic variables like resize actor and simple loops Omega Nuggets Clicker (Classroom 6x) : A specialized version found on Classroom 6x