Gravity Swing

Use arrow keys to move, click on screen to do a pendulum. Check out the two projects below, I used some stuff from them.
https://snap.berkeley.edu/snap/snap.html#present:Username=sayochi&ProjectName=pendulum%20test&editMode&noRun
https://snap.berkeley.edu/project?user=codechespin&project=Ball%20Physics%20v1.0