: Stack Smash is a free H5 game for kids to play online at GaheGames.com. You can play Stack Smash in your browser for free. Stack Smash is not only a ball falling but also an arcade game that is made of 3D game art animation. Your mission is to make the ball fall from the top to the ground by means of avoiding all the black blocks. Glad you will complete all the levels and have fun in Stack Smash!