One of the most overlooked features in is the Disassembler . If you have too many circles (a common issue), feed them into a Disassembler to get "Scrap Metal." Scrap Metal can be used to buy instant "Hero Boosts" or upgrade your conveyor belt speed. Never let idle heroes sit on the belt; recycle them into resources.
Between waves, you navigate a branching map to select rewards, research new technologies, and unlock advanced unit types through a Hero Tree . Because these choices are randomized in each run, players must adapt their factory layout based on the specific buffs and blueprints they encounter. ShapeHero Factory