Leveling Rewards

These are the rewards you get for leveling up.

Start
The following become available for purchase in the market:
 * 1 Max Habitat.
 * 1 Max Treat Farm
 * Treat Farm
 * Plant Habitat
 * Plant Dragon

Level 2
The following become available for purchase in the market:
 * 2 Maximum Habitats
 * ? Max Treat Farm
 * Earth Habitat
 * Earth Dragon

Level 3

 * 3 Maximum Habitats
 * ? Max Treat Farm

Level 4
The following become available for purchase in the market:
 * 4 Maximum Habitats
 * ? Max Treat Farm
 * Fire Habitat
 * Fire Dragon
 * The Stone Path decoration
 * The Plant Element Flag
 * The Fire Element Flag
 * The Earth Element Flag

Level 5
You receive the "Level 5 Park" achievement in the GameCenter.

The following become available for purchase in the market:
 * 5 Maximum Habitats
 * ? Max Treat Farm
 * The Flower Box
 * The Small Flower Bed

Level 6
The following become available for purchase in the market:
 * 6 Maximum Habitats
 * ? Max Treat Farm
 * The Lamp
 * The Cactus
 * The Happy Tree
 * The Traditional Villa
 * The Yellow Tree
 * The Red Tree

Level 7
The following become available for purchase in the market:
 * 7 Maximum Habitats
 * ? Max Treat Farm
 * Breeding Cave
 * Large Plant Habitat
 * Tree Dragon
 * Moss Dragon
 * Poison Dragon
 * Flower Dragon
 * Lava Dragon
 * Bone Dragon

Level 8
The following become available for purchase in the market:
 * 6 Maximum Habitats
 * 4 Max Treat Farm
 * Large Fire Habitat
 * The Fancy Lamp

Level 9
The following become available for purchase in the market:
 * 7 Maximum Habitats
 * 4 Max Treat Farm
 * Cold Habitat
 * Cold Dragon
 * Reindeer Dragon (Limited)
 * Mountain Dragon
 * Blue Fire Dragon
 * The Cold Element Flag

Level 10
You receive the "Level 10 Park" achievement in the GameCenter.

The following become available for purchase in the market:
 * 7 Maximum Habitats
 * 4 Max Treat Farm
 * Second Island
 * Large Treat Farm
 * Colosseum
 * Sun Habitat
 * Moon Habitat
 * Sun Dragon
 * Moon Dragon
 * The Cozy Dogen
 * The Giant Mushroom
 * The Well
 * The Witch Hut
 * The Jack-O-Lantern

Level 11
The following become available for purchase in the market:
 * 9 Maximum Habitats
 * 5 Max Treat Farm
 * Large Cold Habitat
 * Lightning Habitat
 * Lightning Dragon
 * Quake Dragon
 * Crystal Dragon
 * Firefly Dragon
 * Scorch Dragon
 * Storm Dragon
 * The Lightning Element Flag
 * The Snowy Tree

Level 12
The following become available for purchase in the market:
 * 10 Maximum Habitats
 * 5 Max Treat Farm
 * Plant Boost
 * Earth Boost
 * Large Earth Habitat
 * Rainbow Habitat
 * Rainbow Dragon
 * The Large Flower Bed
 * The Thatched Roof Cottage
 * The Dragon Egg Statue

Level 13
The following become available for purchase in the market:
 * 11 Maximum Habitats
 * 6 Max Treat Farm
 * Epic Breeding Island
 * Fire Boost
 * Cold Boost
 * The Ye Olde Buffet
 * The Ami'Lya Pond

Level 14
The following become available for purchase in the market:
 * 12 Maximum Habitats
 * 6 Max Treat Farm
 * Water Habitat
 * Air Habitat
 * Large Lightning Habitat
 * Water Dragon
 * Seaweed Dragon
 * Swamp Dragon
 * Mud Dragon
 * Ice Dragon
 * Air Dragon
 * Willow Dragon
 * Sandstorm Dragon
 * Blazing Dragon
 * Snow Dragon
 * Sonic Dragon
 * Fog Dragon
 * The Water Element Flag
 * The Air Element Flag
 * The Skytree
 * The Dragon Library

Level 15
You receive the "Level 15 Park" achievement in the GameCenter.

The following become available for purchase in the market:
 * 13 Maximum Habitats
 * 6 Max Treat Farm
 * Water Boost
 * Lightning Boost
 * The DragINN
 * The Lightning Crystal
 * The Fire Statue

Level 16
The following become available for purchase in the market:
 * 14 Maximum Habitats
 * 7 Max Treat Farm
 * Third Island
 * Large Water Habitat
 * The Rainbow Element Flag decoration

Level 17
The following become available for purchase in the market:
 * 15 Maximum Habitats
 * 7 Max Treat Farm
 * Air Boost
 * Huge Treat Farm
 * The Volcano

Level 18
The following become available for purchase in the market:
 * 16 Maximum Habitats
 * 7 Max Treat Farm
 * Large Air Habitats
 * Plant Shrine

Level 19
The following become available for purchase in the market:
 * 17 Maximum Habitats
 * 8 Max Treat Farm
 * Earth Shrine

Level 20
You receive the "Level 20 Park" achievement in the GameCenter

The following become available for purchase in the market:
 * 18 Maximum Habitats
 * 8 Max Treat Farm
 * Fire Shrine
 * Fourth Island

Level 21
The following become available for purchase in the market:
 * 19 Maximum Habitats
 * 8 Max Treat Farm
 * Cold Shrine

Level 22
The following become available for purchase in the market:
 * 20 Maximum Habitats
 * 8 Max Treat Farm
 * Lightning Shrine

Level 23
The following become available for purchase in the market:
 * 20 Maximum Habitats
 * 8 Max Treat Farm
 * Water Shrine

Level 24
The following become available for purchase in the market::
 * 22 Maximum Habitats
 * 9 Max Treat Farm
 * Air Shrine

Level 25

 * 23 Maximum Habitats
 * 10 Max Treat Farm
 * The following become available for purchase in the market:
 * Fifth Island

Level 26

 * 24 Maximum Habitats

Level 27

 * 25 Maximum Habitats

Level 28

 * 26 Maximum Habitats

Level 29

 * 27 Maximum Habitats

Level 30

 * 28 Maximum Habitats
 * Sixth Island (Predictment)

The Level gauge also reads MAX in the center of the bar at level 30. Whether this is the final level cap the designers plan or not is debatable.