On Mega Dropper 2 map you will need to drop down through the tunnel without hitting any obstacles. To be precise, it's gonna be 16 levels with different design and difficulty. It's going to be challenging, since you will do it on mobile device.
How to install:
Download and unzip archive
Then go to the any File manager
And copy the map in to the "/storage/emulated/0/games/com.mojang/minecraftWorlds" folder.