I voted for this Game on Greenlight in promise i get a free key once released. When and how do i get my key?

Ask questions and give answers! :D How do I unlock the 6th bird?

dfhg

I'm playing in fullscreen and every time the game shows those, like doors that close upon entering a level or getting out of one, the left one isn't showing properly, the lock is only seen on the right door. Pretty annoying.

I'm finding this really hard but I see on the reviews some are saying it's easy! So I don't know if I just suck or if I'm doing it wrong. Currently I'm stuck on level 21 (the boss that throws the crosses gets me all the time) and my Phoenix is level 13. Is this about right or should I just be grinding the easier levels over and over to level up my Phoenix? Also, does anyone have any tips for this level?...