Classic Mode is one of three gameplay modes. In this mode, launch all the required rockets before all the lanterns on the top of the screen go out and dawn approaches.
In this mode, there are 10 lanterns on the top of the screen representing how much time you have left to launch all the rockets. Every few seconds, a lantern will burn out. When all the lanterns go out, the game is over.
Some powerups might appear on fuses. Use these to your advantage.