Imagine a ball rolling around in a landscape of hills and valleys. The ball will naturally tend to roll downhill until it reaches the lowest point. The goal of quantum annealing is to find the lowest energy configuration of a system, which is like finding the lowest point in this landscape. Instead of physically rolling a ball, we use quantum mechanics to 'tunnel' through barriers to find the lowest point more efficiently.
How to use: Click on the landscape to attempt to move the ball. Observe its behavior in 'Classical' vs. 'Quantum' mode. Try to find the global minimum (deepest blue area).