Tumble Mode is a minigame added to the Console Edition Minecraft, added in the TU41, CU30, 1.33, and Patch 11 updates. It is an official variation of the popular user-generated game called "Spleef".
Similarly to Spleef and Battle Mode, Tumble Mode is a "last player standing" game. The objective of the game is to knock Blocks out from underneath other players while standing your own ground. The last person standing on the platform is the winner and the game cycles to the next map. In one mode of Tumble, players stand on a single, massive platform and attempt to destroy their opponents' footing with an Iron Shovel. In another mode, there are three tiers of platforms which players must dig out from each other using Snowballs.
Unlike traditional Spleef, all blocks can be broken with one hit of a Shovel (similarly to Creative Mode) or Snowball. TNT is an exception, acting as both pitfalls for unaware players and time-bombs which can be used to destroy the ground and lower platforms.
For a Tumble game to end, a player must win 3 rounds. Sometimes Tumble games can last a long time, especially if one player wins one round and then someone else wins the next round and so on. Even if a player needs only one more win sometimes that player can't seem to snag another win and end the game. Usually the more players in the server, the longer a Tumble game can last if this scenario happens.
In the Shovel version of Tumble, there is only one layer so one wrong move will send you falling into the lava below. In this mode, it is easy for players to "island" themselves because shovels can't break blocks unless the blocks are close enough. Because players like to "island" themselves, this tactic can turn a game into a standstill between two players, so the developers made sure this tactic could not be exploited to create a stalemate by giving the remaining players snowballs to use after a certain amount of time is left in the round. This helps make the game end faster, and prevents people on islands from getting a sure win.
In the Snowball version of Tumble, there are three different layers, so one wrong move won't mean immediate death unless you are on the bottom layer or you fall from the middle layer and end up falling through the middle of the bottom layer into the lava if the bottom layer has a huge hole in the center. This game mode can be difficult sometimes, and since the top layer is so small compared to the other layers staying on the top layer can prove to be a challenge. Sometimes rounds can last a while if the last two players are on different layers especially if both of them are good at dodging. Snowballs can "hurt" other players if they are thrown at another player. The sound that plays when you get hurt will play but no knockback happens. You can also punch blocks with the snowballs and break them without throwing the snowballs which is useful if you are near someone, and you have a good trigger finger.