Planets

Planets are a group of levels organized in a circular way, there are a total of 27 Planets (excluding Earth).

List Of Planets
There are 27 planets in the game's Universe. Here is a list of all but one and their locations in Easy mode: Note: Earth can only be accessed once all of the Earth Map fragments have been collected.

Rewards
All planets give an envelope once all levels within them are completed

Some levels that reside on planets give Earth Map fragments (marked by a star on the radar).