(In no particular order of priority.. But (i) should be the first step though..
i) Move the Game components to its own classes
ii) Add a yarn/node api layer for fetching the data
iii) Use of browserify(?)
iv) More ESifying and ES Linting
v) PropTypes
(In no particular order of priority.. But (i) should be the first step though.. i) Move the Game components to its own classes ii) Add a yarn/node api layer for fetching the data iii) Use of browserify(?) iv) More ESifying and ES Linting v) PropTypes