onKeyDown supports arrow keys and not alpha keys
onKeyDown supports arrow keys and not alpha keys

jzitelli/webvr-polyfill,marciot/webvr-polyfill,bkkl/bkkl.github.io,immersive-web/webvr-polyfill,jzitelli/webvr-polyfill,jsantell/webvr-polyfill,cvan/webvr-polyfill,caseyyee/webvr-polyfill,borismus/webvr-polyfill,jsantell/webvr-polyfill,borismus/webvr-polyfill,MetaRoomMarkup/webvr-polyfill,bkkl/bkkl.github.io,immersive-web/webvr-polyfill,marciot/webvr-polyfill,caseyyee/webvr-polyfill