This is a level pack with four levels and the Yama fight.
Level 1: Improve your plasma cannon skills! (fantastic!)
Level 2: Timer level with crushing blocks! (awesome!)
Level 3: Push Block puzzles! (ingenious!)
Level 4: Time your jumps correctly or die in lava! (painful!)
Level 5: Yama fight! Obtain Vlads amulet and his cape to reach Yama! (epic!)
The difficulty is medium. Challenging but doable. *
There is no super epic story behind this. It's just a way to improve your Spelunky skills.
* most of you assess the difficulty higher so I change it to HIGH DIFFICULTY
Level 1: added Bullets to critter section
Level 3: Puzzle slightly harder
Level 4: less ropes
Level 5: moved spikeball