Braid, Anniversary Edition

World 3 introduces green stuff unaffected by time, and makes for a couple puzzles where screwing up means you have to completely start over by leaving the level (via the entrance or exit door) and reentering to reset the level. This is because you can rewind to undo some stuff with the green objects, such as keys. Bear that in mind.

Below is a video showing all puzzle pieces that you can refer to if you get stuck. Full credit to the creator.