Up like a bullet

Klass - the main character of the game tragically died. 

Upon reaching the heavens, he became interested in whether it was possible to return to the world of the living and found out that it is possible, but to do so, he must pass the hardest trial. 

By his own will, Klass rejected the guaranteed place in paradise to prove to everyone that this trial is not as difficult as it seems.

Now he has to climb to the very top of the lost souls world, overcoming all difficulties, and the faster the better.