In Day 9 of my 10 Days of Blockchain series, I take our dApp from “computer players” to actual humans. Up to this point, Alice and Bob were choosing hands at random, but in this lesson I update the front end so you can run the app as either Alice or Bob and pick your own hand through an interactive console UI. The big theme here is: we’re not changing the Reach backend—this is purely a front-end interaction upgrade. I walk through using Reach’s standard library, including the ask.mjs helper for simple console apps, plus input validation patterns (yes/no prompts, JSON parsing for contract info, and mapping user-entered hands like rock/paper/scissors into the numeric values the backend expects). I also show how to create or load an account on Devnet, deploy a contract (or join an existing one), and share contract info between players. Finally, we run the front end in two separate terminal windows—one for Alice and one for Bob—accept wagers, play hands, and see the outcome printed for both participants. The takeaway: this is what it looks like to make a dApp feel interactive and “real,” even before you build a full graphical UI.