I am impressed by the Collisions in this game. I can’t even imagine how you could’ve achieved these adaptive collision shapes.
Update: Oh wait, Now i can: If I were to recreate this game, I would enable/disable the right sets of Collision Shapes based on the bird’s Vertical Position.
I could even imagine doing this for a 2-player game: I ’d have 2 different Collision Layers for both players each, and then the sets of Collision Shapes would add/remove the appropriate layers from their Collision Mask.