Xjump (1997)

A game where you jump up and up while the tower collapses under your feet. The objective of the game is to climb as high as you can before you fall. The speed in which the tower falls grows linearly with time until it reaches a certain threshold. Also, the player can jump higher by first moving sideways, mastering sideways jumps in any given situation, such as a small platform is crucial. There are a few different themes (skins), which the player can choose.