Higher or Lower

The task in the game Higher or Lower is to guess the number at each of the twenty levels. By clicking on the chosen number, you will see its value in the upper right corner. Click on the button with a checkmark in the bottom and if on the left you see an arrow up or down, you must either add a number, or remove until you achieve the desired result. You have twelve attempts on the number of bulbs on the right. Each attempt used is an extinct light bulb. If you are attentive, you are quite enough for this number of options in Higher or Lower.