Thank you for playing, I'm sorry for not replying sooner, but I wasn't notified of comments on this page and have just discovered them. Anyway I'm sorry the code had a bug with the last two symbols being inverted, it is patched with the latest version. The code is matching the symbols on the windows and the semaphore flag numbers. We worked right until the deadline for submission and would have preferred some more time to fine tune and play test, you are correct that it isn't always clear what is interactive, we used some text displayed, but not always, then you only have the slight difference in the change of mouser cursor to show you what to touch, but it's very subtle.