Stick Doors and Island

You're presented with multiple possible escape routes from each room or from the island, and you pick between them. Finding every successful route is the goal, so the game rewards trying options rather than hunting one correct answer.

No, and that's deliberate. Some choices are clever, some are risky and some simply fail. Working out which is which is the puzzle, and a failed attempt tells you something about how the room is put together.

Both. The puzzles alternate between locked rooms and being stranded on a deserted island, so the setting changes even though the underlying question stays the same: which of these routes actually gets you out?

On a computer you play with the mouse, clicking options and objects. On a mobile device you use your finger or a stylus. There's nothing more complicated than that to learn.

Yes, on Android and iOS as well as desktop. It runs in landscape, so turning your phone sideways gives you the full view of the room you're trying to get out of.