Rainbow of the Day by Millepatte is truly an astonishing level and is just an amazing love letter to 1.9. I unfortunately, don't have much nostalgia for 1.9, like many others do, as I started playing mid 2.0. This level just, gives you that nostalgia, in a way, that I don't think many other levels can. It's genuinely so fun to play, so fun to watch, so fun to hear. All of the colors of the rainbow, combined with the song make for an incredible experience unlike any other. I don't think I've had a smile on my face playing any Geometry Dash level, for a long time.