Underwater Content Update

Water Level Generators (2) - Sets the default water level of the room.
Water Level Switches (3) - Sets the water level of the room when hit.
Bodysuit Upgrades (4) - Protects against the corresponding environmental hazard while in water.
Swimming Bodysuit Upgrade - Negates movement restrictions while underwater.
Swimming Flippers Upgrade - Allows infinite jumps while underwater.
Fish Enemy - Swims horizontally in water, flounders on land.
Small Shark Enemy - Swims around in water, motionless on land. Chases after player if nearby.
Jellyfish Enemy - Swims vertically in water, sticks to one spot on land.
Environment Signs (7) - Environment indicators that hang from the background (including Water).
Half Ramps (4) - Ramps that incline at 30 degrees.
Raised Half Ramps (8) - Half-ramps that are offset by half a block, either with a gap or filled.

Added underwater behavior for all enemy types.
Increased damage taken from Bats from 10 to 20.
On the Pause Map, added options to view environments and water levels of each discovered room.
On the Pause Map, replaced cyan borders with magenta borders to indicate checkpointed rooms.
On the Pause Map, replaced flashing effect with cyan border to indicate the current room.
Tweaked the Maker Mode GUI layout.
Other assorted bug fixes.