The blue bar is your stamina, it is drained when you fly upward, replenished while on the ground or by collecting treats.
The green bar is your 'health' (if you call it that, don't worry you don't die) everytime you hit a bird this decreases, when empty it's Game Over!
There are a total of 6 upgrades to purchase, and 35 achievements to earn.
Interactive Buddy
8.8Bloons Tower Defense
9.0Bloons Tower Defense 2
9.0Cut the Rope
8.4Little Cupcake Maker
7.9Merge Jewels Classic
9.2Idle Cult Clicker
7.1Flower Defense Zombie Siege
8.7Element Evolution
8.7Baby Hazel Kitchen Time
8.3Fruit Legions: Monsters Siege
8.4Roxie's Kitchen: Ratatouille
8.5My Little Pony Winter Looks
8.7Girly Equestrian
7.0Rainbow Pony Caring
8.4Jumping Horse 3D
7.6Stallion Spirit Gladiators Fury
8.4Harness Racing
7.1Blonde Sofia: Equestrian
9.0Noob vs Pro: HorseCraft
8.3Unicorn Run
7.5Horse Family Animal Simulator 3D
9.1Stallion's Spirit
7.6MadMad Unicorn
5.9Pony Run: Magic Trails
7.1Horse Champs
7.8Fix the Hoof
8.8Star Stable
7.2Little Pony First Aid
8.52048 Horses
8.2