oceanographicXR31
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Reach the 26th level of the underwater caves.

Controls:
wasd and arrow keys to move. Only cardinal directions,
and there is no wait command.

Press 'ESC' to quit at anytime.

'e' turns your lights on and off, some creatures will only be visible without lights,
and their behaviors will be different.
'g' picks up items in your space.
'>' to go down a level while on an exit.

On the left of the screen is your inventory, pressing the key 
attached to one the items there will use it.

Items:
Battery: Refreshes battery power.
Drill: Drills out all walls and enemies in a cardinal direction;
Oxygen Tank: adds 50% to your supply.
Echolocative Map: Reveals level map.
Comm Relay: Repairs some screen damage.

Local Sonar:
In the bottom right corner of the screen is the local sonar.
This will always display your surroundings, whether they are
visible to you or not.