The game is close to being complete, here are the changes:

• Added a main menu with difficulty settings
• Added small tips whenever you start a game
• Added a game over screen
• Made the game beatable - now you can beat it if you get 6 codes until I add all 8
• Fixed some small issues

Next update, I plan on adding all 8 codes and adding a pause menu, as well as the main menu and game over screen music