TNT Spleef- this is a multiplayer map where you have to try and break the blocks below your opponents. TNT Spleef is a lot easier than breaking blocks, as the blocks disappear faster. If your opponent fail they drown in a lake of lava. Pleasant, huh?
You can use this map with the Multiplayer for MCPE app, local wifi, or on your PocketMine server.
Download it from planetminecraft.com.