GitHub repository: open-source-lab-DFKI/bikerider
Primary language: JavaScript
Description: With BikeRider, players collect ten leaves for every kilometer ridden on a bike. Once they’ve collected 500 leaves, or 50 km, they can plant a tree on a virtual map of Berlin.  The cyclist who has ridden the most kilometers is determined for each month. The 1st- and 2nd-place contestants win a real tree, planted by Berlin’s city tree initiative.