The CEO and COO are at their desks when I knock on the door, intently assembling robots to fulfill the company’s latest order. Tapster is about as lean as startups get. Founded three years ago (on Star Wars Day), the company’s two-person staff is half the size it was at its height, but a third employee moved on, and the fourth was more of an intern, really. It’s a humble operation headquartered in nondescript strip of stores in Oakpark, a quiet suburban village just outside of Chicago.