The Random Island
You awaken on an island, it's very flat and there's no sun or moon... But there's a day/night cycle? You can tell the time through... Nothing, for some reason you just know. This definitely isn't the world you're used to, but both worlds have a lot in common.
✗ Update 4 - Seagulls? (Ehh...)
✓ Update 3 - Moving Clouds + Time of day
✓ Update 2 - Tents + Natives
✓ Update 1 - Water + Island + Trees