Good first start – NSA CryptoChallenge Review

The puzzles are fun. However, the menu buttons in the game are easily triggered. Move them to the top away from the keyboard (or hide through the pause option with a smaller graphic in the top area) to prevent accidental checks, hints, cancelations, etc. Also allow the user a chance to see the completed solution without automatically closing it. Suggestion to have an alphabet table showing character relations to help spot possible patterns, i.e., letter shift. Or show other historic methods of cryptography to help educate. Another suggestion is to, upon the puzzle being solved, identify how that cypher pattern was created (since the puzzles can be solved just by knowing letter frequencies). If adding other helpful items include the letter frequency table as a reference. Perhaps a leaders board to try to beat other times.
Review by Lil' Ranger on NSA CryptoChallenge.