List of Google Easter eggs
In 5.x (Lollipop) and 6.x (Marshmallow), a colored circle appears (or a circle with a stylized M inside in Marshmallow). If continuously tapped, it will turn into a lollipop with the text lollipop inside (or the M changes into a marshmallow in 6.x). Tapping the circle changes the color. When long-pressed, a game of Flappy Bird starts with the Android mascot instead. In Marshmallow, tapping the plus sign adds extra players (up to five), which can be controlled by the user or other players.