Time-Slotted Channel Hopping (TSCH) is a synchronous Medium Access Control (MAC) technology standardized as a part of IEEE 802.15.4e to provide highly reliable communications for resource-constrained devices. While IETF and IEEE standards defined solutions for the configuration of TSCH nodes, the problem of creating dynamic TSCH schedules has been left open. In this poster, we introduce GT-SF, a distributed TSCH scheduling function that is designed based on the non-cooperative game-theory for low-power Internet of Things (IoT) applications. We implement GT-SF on Zolerita firefly IoT motes and the Contiki-NG operating system to examine its effectiveness. The evaluation results demonstrate that GT-SF outperforms Orchestra (the state-of-the-art method) by enhancing the packet delivery ratio and reducing the latency.