About the pausing, when not in own window... why don't you use the real time? Best would be a net-time, so cheating by change the system time would not be possible!
It does require a bit more strategic movement than previous levels. If you end up in a state where you can no longer complete it you may need to restart the lvl (press R).
Dear player, thanks for your comment and support, we are constantly improving our game experience. If you need any help, please feel free to let us know via in-game support, we will be glad to help you. Best regards
What language do you get in the game, the default should be English. If not, please let me know.