You just have the "correct" button joined to a new scene or world with the next question, and the "incorrect" button joined to a Game Over screen.
could you explain more please and how to set a time limit to each scene? if you have time could you make a simple buildbox project which can gives me a clear idea
It's done with menu jumps most likely. You jump to the next world from the button of the correct answer. The button for the wrong answer can be linked by a navigation button to a Game Over screen. As for the timer, I was going to say you could spawn an Action with a negative score and use an Event Observer. But looking at the video, it looks like an enemy is just moving left on the x-axis and it will hit the character when it gets off the screen, causing Game Over. Very clever. At least that's how I would try and do it. Good luck.
