Gravity Simulator
=================

Runs in a browser. Just serve `index.html` and associated `css` and `js`.

Uses `npm` for `eslint`.

TODO
----

[x] Numeric Option Type
[ ] Time Indicator
[ ] Selection Box
[ ] Object List
[ ] Object Detail
[ ] Left Button Panning
[ ] Middle Button Pause
[ ] Grid
[ ] Zoom Easing
[ ] 2-touch Pan & Zoom
[ ] Multi-touch Mass Create