Unlockable backgrounds
Added some backgrounds that can be unlocked by unlocking a certain amount of bird skins. Main motivation for including this was to have more variety of visuals to use in app store screenshots, but also seems like a fun thing to have in the game anyways.
screenshot

Spanish localization
This also sets up localization for other languages with longer words than English. Chinese was easier because the characters all typically fit into whatever space was allocated for English words, but many of the Spanish words ended up being longer which required some UI tweaking.
New spawn chunks in different designs
Rainbows and stars and other fun stuff
Custom level improvements
Removed the json input box for preset custom levels. Originally intended to include those as examples for how to construct a custom level, but received feedback that it wouldn’t be useful to anyone who isn’t familiar with random json formatted text and can even seem intimidating. Replaced it with preview videos of what the custom level looks like.
screenshot
