1. Easter Island (top left) The old version of Easter Eggland. It had the same layout, the same stuff, everything. It's pretty neat and also really cool. 2. Temmie Shopkeeper (top right) Lemonade Cat actually had a Temmie skin, but it was revamped into Pastel Cat. 3. Old Desolate Desert (bottom left) It has the same entire layout and looks really cool. The pyramid couldn't have towers placed on it though. 4. Old Canyon Calamity (bottom right) BUT IF YOU CLOSE YOUR EYES, DOES IT ALWAYS FEEL LIKE NOTHING'S CHANGED AT ALL?!
Pixel-Bit Studios for Tower Heroes, Toby Fox for Temmie. By the way the song is called "Pompeii."