Hi, mysterykxl, thanks for playing and even more for commenting!
To get upgrades on the right you need Wisdom, which you start gaining after a certain point, its at the bottom center under Enlightment (prestige) button. When you see that number rising, you can click Enlightment and cash in the Wisdom you gained. If you have 50% of Wisodm for an upgrade it will be revealed.
Each new generator after Synapse (Neuron, Hemisphere, etc.) generates the genenerator before it, so Neuron generates Synapse. Might need to add more explainer text.
