Birds
There is only one bird that is available for use when you begin the game. If you
want to unlock more characters, you must fight and successfully complete boss
levels. The first two characters you can unlock are Matilda and Chuck.
Bird Classes
The hat or helm that your bird wears represents its class. Every bird has five slots,
each with a different helmet/hat, which means you’re able to upgrade a
character’s class by getting better hats/helmets. Rather than increasing attack
power or health, hats/helmets give you special stat bonuses and special attacks.