Nested Case Switches Giving duplicate case value error ?

You need to read up on switch statements. Do not put code within the switch block that is outside of a case. Your switch (numAttempts) block does not have any case statements but it looks like you tried to put case statements for the switch (numAttempts) block within a conditional which is within a switch (gameState) case block.

I cannot even begin to tell what you want to do.