Play Stack Jump, a free online skill game with very appealing underground graphics.
Will you be able to jump so high as to create the tallest stack of blocks in history? Have fun and challenge your friends in this game.
Whenever you see a block coming, jump in time so that you create the highest possible stack of blocks.
Be careful about jumping in time, especially since as the game progresses through levels (a total of 6 levels), the speed of the incoming blocks increases.