Crashes 50/50 on big falls, after being in-game for a bit, seems to be tied to falling into specific levels (or "screens" rather).

Crashes may sometimes reset your position to the beginning of the game, as well as resetting any bird progress/items you picked up (except cosmetics, they stay on). But oddly enough it doesn't reset your time/jumps/fall statistics. Be warned.

I was a long way through the game when this happened, I had been picking up all the secret items, moving all the birds, despite having to fall as penalty. All gone, that's so much fun I'm refunding. This game is so basic in every single technology aspect, so much so that there's really no excuse for it not to be crossplatform in 2020. Cool game, but needs more penguins.