Hello,
the fact that there is now a sound 5 seconds before the time expires is very useful, but there is a small bug with it.

Start a game, and then stop it, perhaps because another player has joined and you want to include them in the game. While the game is stopped, wait a bit, imagine that the players are chatting. Now, all of a sudden, you will hear the timer warning sound. In fact, the sound comes from the previous game, which is no longer even started, so when stopping the game, the timer should also stop.

Hopefully that makes things clear. Thanks for the fixes.