Trackisi is a fictionnal Roller Derby app for referees and players. I designed pictograms based on WFTDA's hand signals to describe in each sign the designated action on the track. Trackisi's aim is to create a new way of communication between a bout's protagonists, but as well to record bouts scores and help newbies to understand and learn Roller Derby's rules. As a bonus I imagined a card game to re-create your favorite teams bouts and play with roles and penalties.

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