Flash content is getting blocked in the latest versions of browsers. To enable it in Google Chrome,
first open your browser and type chrome://settings/content/flash in the address bar or go there from
menu "Settings / Privacy and security / Site settings / Flash". On a flash setting page, set toggle
to Ask first (recommended). Now, with Flash enabled, whenever you visit a webpage with Flash content,
you’ll need to click on the Flash player for it to start.
Nucleus is a puzzle game on www.flash-games.net in which you do a physical experiment like a scientist. The aim of the game is to get the electron from the start to the goal, by jumping electron orbits. To do this, just click the nuclei of the current atom. Only jump when you are close enough to the next electron otherwise you die. And remember, your jumping distance varies between levels and atoms. As levels progress, it becomes more and more difficult to get the electron. You can try again for many times. Try to master some rules and the distance between atoms. It will give you some inspirations in learning physics. The principle on atoms and electrons is an essential topic for many scientific researches. Ready? Have fun.
If you want to play this game offline and without any browsers after December 2020, then download .swf game file and use any Flash Player that runs .swf files.
For Windows users, I recommend ARFlashPlayer (it supports fullscreen option) or official Adobe Flash Player. Both programs are portable.
Another way to play flash games is to install SuperNova SWF Extension (it works in Chrome only).