Thank. It could defiantly use a bit more of a tutorial explaining what is happening. The numbers on the right indicate the world noise that you have made, so if they reach the top all the monsters wake up and attack you. But it can also indicate that you are too close to the other monsters when it starts rising because they will add to it. But they can just wake up as they have their own count which is hidden to keep the player guessing a little. The original idea was that it would be a bit of a push your luck game with players needing to weigh up the risk of going deeper or turning back and keeping what they had already mined.