Pretty good!
Seeing as how it was made in 2009, I wasn't all that impressed by the graphics. However, it was nice how the game turned out to be pretty fun, actually. Sure, it would have helped if there was some sound or music, but it wasn't terrible. You have taken a very simple premise and have found a way to put different twists on it to make it good. It may not have been the hardest (although I couldn't get past the password level), but it was interesting. It was also nice to get access to the different levels.