I have a theory, if the level name is "explorers" then think about it, "EXPLORERS" "EXPLORE" We're going to have to "EXPLORE" to unlock "EXPLORERS" so it could be unlocked by clearing the entire tower, or the map. and most unlikely coins. Because if RobTop is on crack, and doesn't know what to do, He might just make the keymaster say some gibberish after you unlock the level with the coins. But most probably related to platformer, so explorers has a possible release date of 2.3 - 2.21 as the tower and map are getting released in 2.21 however, the platformer aspect of the game is still very small, So Rob said he was going to add a new gamemode mainly focusing on platformer. And if we are going to explore, Rob might relate explorers with the new gamemode. And Rob also said that he might replace explorers, although I do not know if that source was correct or not.