Features:
- see previous guesses

Future Ideas:
- Multi-player
  - per-player scores
  - working on the same word (vs, not coop)
- Coop multi-player
- limited number of guesses
- quit in the middle of a round?
- web app??!?
- validate input should only accept a-z
- check for solve on last letter guess
- load up list of word banks from a file