one little question:
in the manual is written:
When a hatch is opened, water may flow between the two rooms it connects. This takes no additional time.
If one of the rooms connected by the opened hatch contains a High Water token, and the other room has no Flood token at all, water equalizes between the two rooms. Replace the High Water token with a Low Water token, and add a Low Water token to the room with no Flood token.
so....what will you do in this case: your gnome is located in a room with low water and you open a hatch to a room with high water. what will happen? we played it this way: both rooms have then low water tokens on it.