[Lance]

It would totally help if you put a semicolon after disabledefmovement whenever you are using it. Beyond that, freezeplayer while it is playing the note is just fine.

Next, you need to work on your code structure. Do you notice that you are checking if S is down several times? Nest your flag checks, man, and use else when appropriate.

Finally, the board's code tags are pretty useless if you don't even style your code.

As a suggestion: why not use a while loop to ensure that a is held down instead of a timeout loop?