Whatever letter you think you see just tap on your keyboard and hope you get it right. Its not that simple though as the letters will be corrupted. Easy mode will only have the easiest of curses while medium has a couple harder curses and hard includes all of them. Extreme is like hard but will pick 2 of the curses. This game also has individual high scores for every mode. The timer counts to 10 before losing a life and switching to a new letter. (For some reason the cloud variables thing in the ↙corner in the project page does not seem to work and you have to click start twice for it to actually start)