Gaming on Twitch is largely a one-way affair. You can join a Marbles on Stream race or play a slightly delayed Jackbox Party Pack game, but the service is largely meant for passive viewing. Amazon aims to fix that before long, however. The company tells the New York Times that it's developing games both Twitch streamers and their viewers can play together in "real time." While details are scarce, you should see games become available throughout the summer.