NEW: "Next Milestone" Buy Button (x1, x10, xNext)
Custom Synergies: Miner → Iron Mine = +4% per owned (was 1%)
Chain Bonus(Synergies): +0.25% per previous / -0.20% per next building
Upgrade Milestones simplified:
Before: 1, 10, 25, 50, 70, 100, 125, 150
Now: up to 100 → then +50 (150, 200, 250...)
Fix: Upgrade IDs (save system corrected)
NEXT UPDATE:
Synergy Upgrades for buildings
"Buy Max" button (buy all you can afford)
More improvements and balancing