Stackball.io unblocked game is a game in the game machine category. Playing the game is very simple. To break the rings, jump on the helix and try to break the rings in this way. Watch out for black circles when breaking green circles. Do not break the black rings, so as not to lose the game.
If you break the black rings, the game starts over. So don't touch the black rings. The bar at the top of the game screen shows how much time is left to finish the section. You can see when the game section will end by following the bar on the screen. Quickly click the mouse button and finish the game as soon as possible.