Aquanaut

Aquanaut is an adventure game released February 12, 2008. The player controls a submarine on the search for treasure avoiding enemies and hazards.

Controls
Mouse - Click and hold to make submarine follow the cursor.

Space bar - Drop a bomb

Levels
There are 20 levels in Aquanaut. In each level, the player has to navigate a Submarine through water, with many stone pillars, hazards, and enemies around. The water sometimes rises, the player having to roll on dry land to a spot until the Tide comes back to lift them up. Treasure is found throughout the game.

1: Training Day
This level is very short, it is very basic and only has 2 enemies. This level mostly just teaches how the game is played.

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2: Bomb Training
This level has multiple enemies as well as a tide. It is mostly for teaching how to use bombs.

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3: Up Down Up
This level features multiple enemies and tide again, bombs are needed to complete the level.

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4: Trek Through the Stars
This level features many rotating starfish and pufferfish that make surviving difficult.

5: Give It a Whirl
This level features many obstacles including long Barnacles coming out of Coral and piranahas that dive to hit the submarine. Multiple Whirlpools will pull the Submarine into bad positions like directly underneath a Piranha.

6: Temple of Trouble
This level has multiple dangerous enemies including many Starfish. The Tide returns with the Tide going from extremely low to extremely high.

7: Little Nippers
This stage is loaded with enemies all over it. The Little Nippers may refer to the multiple Piranhas

8: Get Lost
This stage is a large maze with multiple paths must of which lead to enemies or treasuer. Only one path leads to the treasure chest.

9: Tongue Tied
This stage has two paths that both lead to the same path eventually. The path to the left is longer and has less barnacles and more jellyfish. The right path has more Barnacles than the left path. Both paths force the player to get past a starfish.

10: Huff n Puff
This level features the return of many enemies from older levels including star shooters and pufferfish and has a small tide.

11: High and Dry
This level requires the player to go over long, dry expanses of land covered in Hermit Crabs. After getting past the dry area, the player has to go through multiple enemies to get to the Treasure Chest

12: Under Pressure
This level has many Jellyfish among other enemies. By squeezing through a narrow gap early on in the level (Damaging themselves slightly on spikes) the player will arrive near the treasure box.

13: Tide and Tested
This level has very extreme tide going from very low to very high in a matter of seconds. The player must avoid Hermit Crabs and Starfish while the tide is right to avoid damage to the Submarine.

14: Jelly Heaven
A level completely comprised of a maze of jellyfish.

15: Killer Calamari
This level features many Squid that shoot Homing Squid, there is also an extremely varied tide. A few crabs also appear.

16: Underground Overground Wobbling Free
This level starts with two paths the above with two Hermit Crabs the lower with two Pufferfish. Following is a Starshooter and a path with two more Hermit Crabs and three Barnacles. The current must then be used to jump a pillar with a Squid and Starshooter guarding the Treasure Chest.

17: Round The Twist
This level has at least one of every enemy and many corners and narrow paths of spikes.

18: Bite The Bullet
This level has every enemy and requires doing things the 'other way'. Great Speed is needed.

19: Go Against The Flow
This level requires going through spikes and enemies by going through currents and whirlpools.

20: Kill The Serpent
This level has the Sea Serpent and has to be killed by a lot of bombs.

Enemies

 * Jellyfish - They may move or simply be still in a level, and can be destroyed by two bombs.
 * Hermit Crabs - They can walk on walls and the ceilings as well as on the ground, and can be destroyed by three bombs.
 * Starfish - It remains stationary and rotates on the spot. Cannot be destroyed.
 * Pufferfish - Periodically, they will expand to take up more space in the level before shrinking back to a smaller size. They can be destroyed with one bomb when they are not inflated.
 * Barnacles - They have a tongue that sticks out, hurting the submarine on contact. Can be destroyed with 3 bombs by hitting the bomb on the tongue.
 * Lionfish - When the submarine is underneath one, the submarine will be chased until it moves out of the way. Can be destroyed with 3 bombs.
 * Starshooters - They remain in one place and throw little starfish at the player. Can be destroyed with 2 bombs.
 * Squids - Attack the submarine with homing squids. Can be destroyed with 3 bombs.
 * Homing Squid - Will hurt the submarine on contact.
 * Sea Serpent - As the last boss of the game, the player needs to defeat it successfully in order to pass the level.

Hazards

 * Spikes - Cover certain areas of the game and hurt the submarine on contact.
 * Currents - Push the submarine in one direction if still.
 * Whirlpools - Draws submarine towards it, often towards hazards and enemies as well.

Beta Elements
Two beta elements of Aquanaut were discovered on Simon Hunter's website: the beta logo for the game and beta squid. The beta logo had the words Aquanaut underwater with the water coloured sub jumping out of it. The beta squid looked different than the final squid in the game, the beta squid had its tentacles outstretched as if it was trying to catch the player, while the final one has the Squid's tentacles down in a kind of arrow shape.

Trivia

 * Humorously, the player can highlight the text shown on walls in levels.
 * Level 18 Bite the Bullet may be a reference to one level in Hot Air 2 with the same name.