workaround for missing Uint16Array on android

src/util/random.js

@@ -2,7 +2,7 @@ import dictionary from '../../res/words.json'
 
 // TODO: make it secure!
 export function words() {
-  let buf = (new Uint16Array(11)).map(_ => Math.random() * dictionary.length)
-  return Array.from(buf).map(n => dictionary[n]).join(' ')
+  let buf = Array.apply(null, { length: 11 }).map(Function.call, () => Math.random() * dictionary.length)
+  return buf.map(n => dictionary[Math.floor(n)]).join(' ')
 }