NOTE: The last download above is updated (post compo, but a very slight change, like 5 lines of code) to include a sensitivity option, edit the number in "sensitivity.txt" to change your sensitivity.

How to play:
Grab valuable stuff and bring it back to the start area (marked with red lights).

Your submersible has limited energy (its engine uses energy when moving or idling (the engine can be turned off with Q), and the lights drain power as long as they're on ('E' toggles lights)), and the only way of recharging is to get back to the spawn area.

It is easy to get lost in the murky water, so it's advisable to leave a trail for yourself with beacons (press F to drop a green beacon). Beacons can be seen from fairly far in the fog.

Your sub can also only hold a certain weight of loot, and the more you carry, the slower your sub gets.

After you have some stuff, go into the circle of red lights at the start area, and press space to sell it off. From there you can press enter in the spawn area to buy upgrades and beacons.

I would've had more interesting gadgets to buy (sonar, etc), predators to avoid (sharks), and more types of loot to find etc, but a power and then internet outage happened... I'm still pretty happy with what I got done in the time I had though.

Controls:
WASD: Move
Q - Toggle Engines
E - Toggle lights
F - Place beacon
Left Click - Pick up salvage
Space/Enter/Arrows navigate menus and such.

EDIT: oh, and GPL'd source is included (src.zip).