If you've missed our earlier coverage of Secrets of Raetikon, know that it's an exploratory game first and foremost. You play the role of bird capable of flying all over the game world, but only by interacting with objects on the ground can you discover those titular secrets. That's not as simple as landing and tapping an object though, as the world of Secrets of Raetikon is populated by other critters who interact with you and one another according to their real-world behaviors.
"Hostile animals protect their habitats and interact with the player as well as each other, forming a complex ecosystem: drag a bird of prey to another predator and they attack each other; grab a robin and feed it to a buzzard – it will attack the poor bird instead of you; defend yourself by wielding spiked plants or by pushing foes into thornbushes," reads the game's description.
While not yet complete, the version of Secrets of Raetikon that enters Steam Early Access will include the game's campaign and level editor, though not its "grand finale." Given that the level editor offers Steam Workshop support you should be able to find ample user-created maps to tide you over until developer Broken Rules unveils the game's ending during the first part of 2014.