Stack Challenges
![](http://www.4j.com/thumb/201903/Stack-Challenges.jpg)
How fast can you react, how high can you build a block house? Click your mouse when the higher platform is overlapping with the lower platform. This game is simple to play, but hard to get a high score. Enjoy Stack Challenges!
How fast can you react, how high can you build a block house? Click your mouse when the higher platform is overlapping with the lower platform. This game is simple to play, but hard to get a high score. Enjoy Stack Challenges!