[ReactJS] Hangman Game

hey folks!
could you please give me any feedback on my currently developed project:

Hangman Game

you can cheat a bit for testing and open your developer tools, in the console there is word to guess.

just type in letters to active window :wink:

Any issues related to

  1. performance,
  • code ‘spaghettiness’,
  • logic,
  • displaying on OSX’s retina displays (screenshots will do)
  • overal look and feel

Thanks in advance!