Mineforgian
Basically an escape room, with three main levels. It is short, but very difficult. Good luck.
Across the whole map, you will need to use the three-second-immunity glitch.
Ender pearl clipping, lava swimming and more.
Warning: If you die once in this map, you will probably have to download it again and erase the old save. Items won't re-appear neither blocks or item frames.